Invalid Argument exception? - C# Discussion Boards

Re: Help with TypeLoadException (marshaling unmanaged code)

TomWolfstein4-Jul-07 21:57

4-Jul-07 21:57

Hi.
Sorry it took me so long to answer. It's exam period..

I'll start with the end. I completley agree that it's best to learn P/Invoke and the principles of marshaling unmanaged code to managed code, and that simple examples should come before diving into a project like this.
I wish I knew all this 3 month ago when I started this. I didn't, and didn't have much choice as I am not writing this for my pleasure but as a final project for my degree. I am as unhappy with this as much as you can imagine. I want to thank you again for taking the time to explain all of this to a newbie like me.
Besides, don't they always say the best way to learn to swim is to just dive in Smile | :)

Now back to the fun (?).
1. I understand the structure I created to replace the union is not a good idea. I tried it as a way of getting the structure containing to occupy the same size it would have, had I used a union.
Now that I think the problem is somewhere else I can probably (hopefuly) change it back.

2. You are probably right here again. When I tried to offset the union 8 bytes, the alignment error disappeared and was replaced by the error caused by trying to marshal an array of structs.
Maybe this is because some of these structs have marshaled arrays in them.

4. Trust me, you are not the only obe confused by these structs, but as I said at the begining, the C source code is not mine. It is an open source implementation of the VC1 video standart. I'll be happy to send it to you if you are interested.
Meanwhile, I'll try to be clearer. I imported all of structs from the C code to C#, and marshalled all of them.
Basicaly there are two structures who contain in them, by way of value, reference and other, all of the other structures in the code.
I am sending an IntPtr from the C# code to the VC1 decoder (C code), and return that IntPtr with the address of the structure I want to access (I do it with 'out' rather than actually returning it, but the result is the same).
Right now some of the fields in the super struct (int C#) are garbage, and some are perfectly accessible. I think (and please correct me if I am wrong. there is a good chance I am), that this is because I did not import and marshall ALL of the structs, and this is causing an alignment error in the C# super struct, making it not the same size as the C code struct.

I have this struct 'vc1_sMB':

/** Description: A structure to hold macroblock data.*/<br />
        [StructLayout(LayoutKind.Sequential)]<br />
<br />
        public unsafe struct vc1_sMB<br />
        {<br />
            vc1_eMBType eMBType;            /** Macroblock type */<br />
            vc1_eACPred eACPred;            /** AC prediction status */<br />
            vc1_eBlkType eBlkType;           /** One of 8x8,8x4,4x8,4x4, or Any<br />
                                                    (Any=block based choice) */<br />
            byte OverlapFilter;      /** Overlap filter active for this macroblock */<br />
            byte Skipped;            /** Indicated macroblock is motion predicted only */<br />
            byte CBPCY;              /** Coded  block pattern, where:<br />
                                                  *  - bit 5 set means Y0 is coded<br />
                                                  *  - bit 4 set means Y1 is coded<br />
                                                  *  - bit 3 set means Y2 is coded<br />
                                                  *  - bit 2 set means Y3 is coded<br />
                                                  *  - bit 1 set means Cb is coded<br />
                                                  *  - bit 0 set means Cr is coded<br />
                                                  */<br />
            byte MVBP;               /** Motion vector block pattern, with:<br />
                                                  *  - bit3 set if dmv!=0 for Y0<br />
                                                  *  - bit2 set if dmv!=0 for Y1<br />
                                                  *  - bit1 set if dmv!=0 for Y2<br />
                                                  *  - bit0 set if dmv!=0 for Y3<br />
                                                  */<br />
            vc1_sQuant sQuant;             /** Macroblock Quantizer information */<br />
            <br />
            /***vc1_sBlk sBlk[VC1_BLOCKS_PER_MB];    /** Block level information */<br />
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)] public vc1_sBlk[] sBlk; <br />
            /** Block level information */<br />
            <br />
        };

As you can see in the last line, there is a marshaled array of 'vc1_sBlk' structs.
The C version of this struct is exactly the same apart ftom the marshaled array, and I left the arrays original definition commented.

'vc1_sBlk' looks like this (now marshaled like you said to implement the union):

/** Description: Structure defining the state required for a block.*/<br />
        [StructLayout(LayoutKind.Explicit, CharSet=CharSet.Ansi)]<br />
        public unsafe struct vc1_sBlk<br />
            {<br />
               [FieldOffset(0), MarshalAs(UnmanagedType.I4)] public vc1_eBlkType eBlkType;<br />
               /** Block type */<br />
               <br />
               [FieldOffset(4), MarshalAs(UnmanagedType.U1)] public byte Coded; <br />
               /** Non zero AC coefficients for Intra, non zero AC/DC for Inter */<br />
<br />
               [FieldOffset(8)] public vc1_sBlkIntra sIntra; /** Intra block state information */<br />
               [FieldOffset(8)] public vc1_sBlkIntra sInter; /** Inter block state information */<br />
            };

While it's original definition in the C code is this (FLAG is a 1B short):

typedef struct<br />
{<br />
    vc1_eBlkType        eBlkType;       /** Block type */<br />
    FLAG                Coded;          /** Non zero AC coefficients for Intra,<br />
                                            non zero AC/DC for Inter */<br />
    union<br />
    {<br />
        vc1_sBlkIntra   sIntra;         /** Intra block state information */<br />
        vc1_sBlkInter   sInter;         /** Inter block state information */<br />
    }                   u;              /** Intra/Inter union */<br />
} vc1_sBlk;

And as you've seen before 'vc1_sBlkIntra' looks like this in c#(the C code is in comments):

/** Description: Structure defining the state required for intra blocks.*/<br />
      [StructLayout(LayoutKind.Sequential)]<br />
      public unsafe struct vc1_sBlkIntra<br />
          {<br />
              ushort NZC;            /** NUMZERO and NUMCOEF (excludes DC) */ <br />
              /**** ushort was originally 'vc1_NumZeroCoef' which is a typedef in the decoder***/<br />
              short DC;             /** Quantized DC for prediction */<br />
              /***short ACTop[7];       /** Quantized AC top row for prediction */<br />
              [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)] public short[] ACTop; <br />
              /** Quantized AC top row for prediction */<br />
              /***short ACLeft[7];      /** Quantized AC left column for prediction */<br />
              [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)] public short[] ACLeft; <br />
              /** Quantized AC left column for prediction */<br />
              /***short moothRows[16]; /** Bottom two rows kept for overlap smoothing */<br />
              [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public short[] moothRows;<br />
              /** Bottom two rows kept for overlap smoothing */<br />
          };

And 'vc1_sBlkInter' looks like this:

/** Description: Structure defining the state required for inter blocks.*/<br />
      [StructLayout(LayoutKind.Sequential)]<br />
      public unsafe struct vc1_sBlkInter<br />
      {<br />
          /***vc1_NumZeroCoef NZC[4]; /** NUMZERO and NUMCOEF for sub-blocks (includes DC) */ <br />
          /**** ushort was originally 'vc1_NumZeroCoef' which is a typedef in the decoder***/<br />
          [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public ushort[] NZC; <br />
          /** NUMZERO and NUMCOEF for sub-blocks (includes DC) */<br />
          <br />
          /***vc1_sMotion sMotion[2];     /** Forward and Backward motion parameters */<br />
          [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)] public vc1_sMotion[]  sMotion;<br />
          /** Forward and Backward motion parameters */<br />
      } ;

I will not bother you with all the definitions of the other structures (everything that starts with an s, since there is nothing interesting there but normal type variables).

So 'vc1_sBlk' has in it structures that contain marshaled arrays (which like you said are references, if it matters).

All of this compiles without problem, but after I changed the offset to what you suggested, the error I got is this:
Cannot marshal field 'sPosition' of type 'vc1DEC_sState': The type definition of this field has layout information but has an invalid managed/unmanaged type combination or is unmarshalable.

(I apologize. This really is never ending)

'vc1DEC_sState' is this (only the first line is important, but I pasted all of it):

  /** Description:Structure containing the state of the decoder.**/<br />
        [StructLayout(LayoutKind.Sequential)]<br />
        public unsafe struct vc1DEC_sState<br />
        {<br />
            public vc1_sPosition sPosition;     /** Macroblock position structure */<br />
            vc1_sPicture pPicture;              /** Picture information */<br />
<br />
            public int FrameNum;               /** Current frame number */<br />
<br />
            /* Pointer to other data structures */<br />
            vc1_sMB pMB;                   /** Pointer to macroblock data */<br />
            <br />
            /* Limits */<br />
<br />
            int NumFields;              /** Number of fields per frame */<br />
            int MaxMBs;                 /** Maximum number of macroblocks */<br />
            vc1_sLevelLimit pLevelLimit;           /** Limits for current level and profile */<br />
<br />
            /* Configuration */<br />
            vc1_sSequenceLayer sSeqParams;             /** Data from the sequence layer */<br />
            vc1DEC_sPictureLayerParams sPicParams;          /** Data from the current picture layer */<br />
<br />
            byte NotFirstMode3InFrame;   /** 1 if not first mode 3 escape in frame */<br />
            /* (8.1.1.10 AC coef decoder) */<br />
            byte LevelCodeSize;          /** Level code size for mode 3 escape,<br />
                                                                per frame */<br />
            byte RunCodeSize;            /** Run code size for mode 3 escape, <br />
                                                                per frame */<br />
<br />
            byte ZigZagTableIndex;       /** Index to select zigzag table */<br />
            byte FirstFrameInStream;     /** Non-zero if this is the first frame */<br />
            byte BitplaneCodingUsed;     /** Non-zero if bitplane coding is in use */<br />
<br />
            byte FirstCodedBlock;        /** First coded block in current macroblock */<br />
<br />
            public vc1_sReferencePicture pCurrentRef;     <br />
            /** Pointer to the current reference picture into which blocks are decoded */<br />
<br />
            vc1_sMotionHist pMVHistBuffer;         /** Pointer to the motion vector history buffer */<br />
            uint FieldCount;             /** Number of fields present in the current picture */<br />
<br />
        }

And inside it, the 'sPosition' mentioned is this (again just notice that vc1_sMB is defined here):

  /** Description:<br />
         * Current position structure describing the macroblock being<br />
         * processed and the slice, field, and picture it lies in.<br />
         */<br />
        [StructLayout(LayoutKind.Sequential)]<br />
        public unsafe struct vc1_sPosition<br />
        {<br />
            vc1_ePictureType ePictureType;   /** Picture type: I, P, B or BI */<br />
            vc1_ePictureFormat ePictureFormat; /** Picture format: Progressive, Interlace Field/frame */<br />
            vc1_eProfile eProfile;       /** Profile Simple/Main/Advanced */<br />
            vc1_eMVMode eMVMode;        /** Motion vector mode for this picture */<br />
            vc1_eMVRange eMVRange;       /** Motion vector range setting for this picture */<br />
            byte BottomField;    /** 0=Top Field, 1=Bottom Field */<br />
            byte SecondField;    /** 0=First Field, 1=Second Field */<br />
            vc1_sMB pCurMB;        /** Pointer to the current macroblock */<br />
            vc1_sMB pStartMB;      /** Pointer to start of macroblock circular buffer */<br />
            vc1_sMotionHist pMVHist;       /** Current position in motion vector history buffer */<br />
            uint SizeMB;         /** Circular buffer size in macroblocks */<br />
            ushort X;              /** X macroblock offset in current slice */<br />
            ushort Y;              /** Y macroblock offset in current slice */<br />
            ushort SliceY;         /** Y macroblock offset of slice in picture */<br />
            ushort WidthMB;        /** Width in macroblocks of coded picture */<br />
            ushort HeightMB;       /** Height in macroblocks of coded picture */<br />
            public uint CodedWidth;     /** Width in pixels of coded picture */<br />
            public uint CodedHeight;    /** Height in pixels of coded picture */<br />
            uint MaxCodedWidth;  /** Max Width in pixels of coded picture */<br />
            uint MaxCodedHeight; /** Max Height in pixels of coded picture */<br />
            byte PQuant;         /** Picture quantizer */<br />
            byte BFraction;      /** BFRACTION syntax element */<br />
            byte NumRef;         /** Number of reference fields-1 */<br />
            byte RefField;       /** Reference field when NumRef==0 */<br />
            byte IntraBias;      /** Bias to add to intra blocks post transform */<br />
            byte RangeYScale;    /** Y scaling factor times 8 */<br />
            byte RangeUVScale;   /** UV scaling factor times 8 */<br />
            byte FastUVMC;       /** Fast U,V motion compensation byte */<br />
            vc1_ePictureRes ePictureRes;    /** Picture resolution scale mode */<br />
            vc1_sReferencePicture pReferenceOld;  /** Pointer to old I/P reference picture */<br />
            vc1_sReferencePicture pReferenceNew;  /** Pointer to new/current I/P */<br />
            vc1_sReferencePicture pReferenceB;    /** Reconstructed B picture */<br />
            vc1_sReferencePicture pReferenceNoIC; <br />
            /** Backup copy of reference before intensity compensation applied */<br />
<br />
            /***vc1_sScaleMV pScaleMV[2];        /** MV scaling (forward, backward) */<br />
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]<br />
            public vc1_sScaleMV[] pScaleMV;        /** MV scaling (forward, backward) */<br />
            /***short pSmooth[6][64]; /** Overlap smoothing macroblock history (left) */<br />
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6*64)] public short[] pSmooth;<br />
        } ;

All of this brings us back to the begining (did I apologize already for the length of this?)
If you remember in the begining of this post, 1e100000000000 lines above, I said that the last line of 'vc1_sMB' is the declaration of a marshaled array of 'vc1_sBlk'.
If instead of this array I declare this:
public vc1_sBlk sBlk; /** Block level information */ Then there is no error.
I can't get access to all of the fields in all of the structs, but at least there is no error.

So, finally, I suspect this array.
Am I right to suspect it?
Am I on the right way to gain normal access to the structs fields?
Would it help if I sent you the C code?

I did not intend for this to be the longest post ever. I am deeply thankful for the time you are putting into just reading all of this, not to mention trying to understand and come up with solutions.

Thanks.
Tom.

Re: Help with TypeLoadException (marshaling unmanaged code)

Luc Pattyn5-Jul-07 0:17

Luc Pattyn

5-Jul-07 0:17

Hi Tom,

1.
yes I would like to have the C code in a compilable and runnable form. Please email it
using the email button below. Have some questions:
1.1. Which tool do you use to build it ? (I hope Visual Studio 6)
1.2. Does it use "normal" sizes (1B byte, 2B short, 3B int, ...) ?
1.3. Where did you get the source exactly ?
1.4. Did you change anything ? If so did you comment that in the source ?
1.5. Did you add code to print out:
- struct sizes ?
- and field offsets ? Are they what you expected ?
- field values ?

2.
I entered your C# code in a C# project, but I am missing a lot:
several vcl_### types such as vc1_eMBType; I hope most of them are int enums.
I think you best also send me the source of C# class that is supposed to call the C stuff.

3.
to access vc1DEC_sState.sPosition one must get all its members marshalled (almost) correctly;
as long as something is wrong in say vc1_sPicture, it will continue to give that kind
of run-time errors.
And that's exactly why I tend to build a marshalling job from bottom to top,
so you get something working and this gives you the energy to continue...

4.
Are you sure you need the unsafe keyword ? what is it supposed to bring you ?

5.
some of your fields are public, most of them not. Why is this ?
If you dont need to access most of the fields in C#, you can replace them by something simpler
having the same size (such as vc1_sMB in vc1DEC_sState !?!?

Greetings

Luc Pattyn

[My Articles] [Forum Guidelines]

Re: Help with TypeLoadException (marshaling unmanaged code)

Luc Pattyn1-Jul-07 9:14

Luc Pattyn

1-Jul-07 9:14

Hi Tom,

FYI: in C# the following struct

[StructLayout(LayoutKind.Sequential)]<br />
public struct ccc {<br />
    int a1;<br />
    byte b1;<br />
    int a2;<br />
    byte b2;<br />
    int a3;<br />
    byte b3;<br />
}

has a Marshal.Sizeof of 24 as I expected; each byte gets followed by 3 padding bytes
to align the next int.
And that is also how I recall it from C (I did not test that now).

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

validating a formula

Bojja Lakshmi30-Jun-07 2:50

Bojja Lakshmi

30-Jun-07 2:50

how i can validate a formula.

formula contains column names of a table..

pls help for this

Lakshmi

Re: validating a formula

User 665830-Jun-07 3:32

User 6658

30-Jun-07 3:32

What formula?

modified 12-Sep-18 21:01pm.

DataGrid with checkbox

-spy-30-Jun-07 2:40

-spy-

30-Jun-07 2:40

hi guyz..

Any one know how to make a datagrid with checkbox in each row(email style),
I will use it for multiple selection, I'm using c#.net 2003.. I want my application to have this feature..

tnx in advance n_n

Re: DataGrid with checkbox

DanB198330-Jun-07 8:24

DanB1983

30-Jun-07 8:24

Hey

Try this link for some hints:

http://www.asp.net/learn/dataaccess/tutorial12cs.aspx?tabid=63

Hope it helps

Dan

Invalid Argument exception?

$uresh $hanmugam30-Jun-07 1:58

$uresh $hanmugam

30-Jun-07 1:58

Hi all,
I have try to convert a pdf to tiff file.My below the code snippet is working fine when i open a tiff file and convert some other format..But it didn't work when i open the pdf file,it will be thrown error like "Parameter is not valid" from below the code at bold line "Image image = Image.FromStream(fromImageStream, false,true);" please help me what i did wrong.

private void button4_Click(object sender, System.EventArgs e)<br />
        {<br />
           <br />
            FileStream fstPersons = new FileStream(@"c:\\toto.tiff",<br />
                  FileMode.Create,FileAccess.Write);<br />
            BinaryWriter wrtPersons = new BinaryWriter(fstPersons);<br />
<br />
            FileStream fStream = new FileStream(@"c:\\Sample.pdf", FileMode.Open,<br />
             FileAccess.Read);<br />
            BinaryReader reader = new BinaryReader(fStream);<br />
<br />
            FileInfo info = new FileInfo(@"c:\\sample.pdf");<br />
<br />
            byte[] fromImage = null;<br />
          <br />
                fromImage = reader.ReadBytes((int)info.Length);<br />
<br />
                reader.Close();<br />
                fStream.Close();<br />
<br />
                // Read the image from the byte variable into a bitmap variable<br />
                MemoryStream fromImageStream = new MemoryStream();<br />
                fromImageStream.Write(fromImage, 0, fromImage.Length);<br />
                Image image = Image.FromStream(fromImageStream, false,true);<br />
                Bitmap bitmap = (Bitmap)image;<br />
                // Instantiate the encoder<br />
                EncoderParameters encoderParams = new EncoderParameters();<br />
                encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, 50L);<br />
                ImageCodecInfo codecInfo = GetEncoderInfo("image/tiff");<br />
                MemoryStream newImage = new MemoryStream();<br />
                // Convert the image to the new format<br />
                bitmap.Save(newImage, codecInfo, encoderParams);<br />
                // Read the new image into a byte variable<br />
                byte[] data = newImage.ToArray();<br />
<br />
                wrtPersons.Write(data);<br />
<br />
                fstPersons.Close();<br />
                wrtPersons.Close();<br />
     <br />
        }<br />
<br />
 <br />
<br />
       private static ImageCodecInfo GetEncoderInfo(String mimeType)<br />
        {<br />
           int j;<br />
           ImageCodecInfo[] encoders;<br />
           encoders = ImageCodecInfo.GetImageEncoders();<br />
           for(j = 0; j < encoders.Length; ++j)<br />
           {<br />
            if(encoders[j].MimeType == mimeType)<br />
             return encoders[j];<br />
           }<br />
           return null;<br />
        }<br />

thanks in advance

Re: Invalid Argument exception? [modified]

Luc Pattyn30-Jun-07 3:07

Luc Pattyn

30-Jun-07 3:07

Stream operations are very much like good old file operations:
if you write a file, then want to read what has been written, you must either close and reopen,
OR somehow "rewind" the file. Look for an appropriate stream method
(or property) to do this...

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

reading file error

tauras8130-Jun-07 1:41

tauras81

30-Jun-07 1:41

hi while reading a file named with underscore i am having error illegal characters found how can i remove it and how to find the particular position in a file

Re: reading file error

Luc Pattyn30-Jun-07 1:58

Luc Pattyn

30-Jun-07 1:58

please be specific, show the error messages and Exception.ToString(), show the code,
tell us which parts work and which dont...

(so read and apply the forum guidelines !)

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

array of type label

Glen Harvy29-Jun-07 23:47

Glen Harvy

29-Jun-07 23:47

Hi,

I have the following hardcoded labels:

this.labelAWeekAgo1.Text = lastWeek.ToString();
this.labelAWeekAgo2.Text = lastWeek.ToString();
..
this.labelAWeekAgo10.Text = lastWeek.ToString();

with each individual label contained within a loop that contains a function with the result generating "lastweek".

How can I code the label variable that changes programatically ie the number at the end of the labels name depending on which pass thru the loop I'm in eg

for i=0 etc
this.labelAWeekAgo[i].Text = lastweek.ToString();

Glen Harvy

Re: array of type label

Sathesh Sakthivel29-Jun-07 23:53

Sathesh Sakthivel

29-Jun-07 23:53

Use For loop

for(i=0;i<9;i++)
{
//your code
}

or you can use foreach which is more easy.

Details[^]

Regards,

Satips. Rose | [Rose]

Re: array of type label

Glen Harvy30-Jun-07 0:09

Glen Harvy

30-Jun-07 0:09

Thanks for the prompt reply.

I'm trying to avoid having to do the following for each hardcoded label:

Label[] lbThisWeek = new Label[10];
for (int i = 0; i < lbThisWeek.Length; i++)
{
lbThisWeek[i] = new Label();
}
lbThisWeek[0] = this.labelThisweek1;
lbThisWeek[1] = this.labelThisweek2;
lbThisWeek[2] = this.labelThisweek3;
lbThisWeek[3] = this.labelThisweek4;
lbThisWeek[4] = this.labelThisweek5;
lbThisWeek[5] = this.labelThisweek6;
lbThisWeek[6] = this.labelThisweek7;
lbThisWeek[7] = this.labelThisweek8;
lbThisWeek[8] = this.labelThisweek9;
lbThisWeek[9] = this.labelThisweek10;

Doing this allows me to use the loop to perform my actions but it seems I have to create separate arrays for each item as I can't see how you pass [i] to a hardcoded control name.

Glen Harvy

Re: array of type label

Luc Pattyn29-Jun-07 23:57

Luc Pattyn

29-Jun-07 23:57

Hi,

create a collection of your labels (an array, an ArrayList, a List, whatever),
and foreach them.

If its all the labels on a form, you could also foreach your form's controls as in:

foreach (Control c in myForm.Controls) {
    Label lbl=c as Label;
    if (lbl!=null) doSomethingToLabel(lbl);
}

Finally you could use reflection to find all the labels with a specific name syntax,
but that seems overkill (and expensive) in this case.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Re: array of type label

Glen Harvy30-Jun-07 0:11

Glen Harvy

30-Jun-07 0:11

Thanks,

Yes - it looks like an array for each label concerned is the easiest - thank heavens for search & replace.

Glen Harvy

Re: no Replace !!

Luc Pattyn30-Jun-07 1:14

Luc Pattyn

30-Jun-07 1:14

Ho ho, I think no one suggested changing the label names; if you replace myLabel1 by
myLabel[1] the Visual Designer will no longer understand it (the declarations would
be wrong).

What you should do is keep the labels as they are, and on top of that create a list
(an array or some other collection) that holds references to them, so you can foreach it.
You could create and populate the list right after the call to InitializeComponents().

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Re: array of type label

Guffa30-Jun-07 0:08

Guffa

30-Jun-07 0:08

Create an array of references to your labels:

Label[] labelAWeekAgo = new Label[] { labelAWWeekAgo1, labelAWWeekAgo2, ... ,labelAWWeekAgo10};

Note that the index for the array is zero based.

If you use foreach to loop the array, you don't use an index:

string lastWeekString = lastWeek.ToString();
foreach (Label label in labelAWeekAgo) {
   label.Text = lastWeekString;
}

---
single minded; short sighted; long gone;

console application creation

DKalepu29-Jun-07 22:52

DKalepu

29-Jun-07 22:52

Hi All,

I have developed a windows application using serial port.

Now, i am asked to convert it into a .exe file(console application)..Is it possible? if so, how can i do it??

could any one please help me...

Thanks in Advance.

Re: console application creation

Christian Graus29-Jun-07 23:01

Christian Graus

29-Jun-07 23:01

Just create a console app and move your code into it. The main thing is, a console app does not have events, so you need to build your own menus and so on in plain text.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: console application creation

DKalepu30-Jun-07 0:13

DKalepu

30-Jun-07 0:13

I have done it in the same way...
ITs running well on my machine... But when I run that .exe file on another machines its saying

" application failed to initialize properly: Click OK to terminate the program"

whats the problem??

how can I run my .exe on another machines as well....???

Confused | :confused:

Re: console application creation

Luc Pattyn30-Jun-07 0:55

Luc Pattyn

30-Jun-07 0:55

There can be several reasons for this, try Google to see them.
Best guess is read access violation on some DLL file.

BTW the message typically includes an error code, if it did you should show it.

Smile | :)

Luc Pattyn

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how to create mdi?

help as an alias29-Jun-07 22:49

help as an alias

29-Jun-07 22:49

please give me code for create an child(already designed) form with in mdi form

Re: how to create mdi?

Sathesh Sakthivel29-Jun-07 23:55

Sathesh Sakthivel

29-Jun-07 23:55

We cannot do your work.

What you have done so for and what error it shows tell us that i have done this but i am getting this error.

Regards,

Satips. Rose | [Rose]

Re: how to create mdi?

Christian Graus30-Jun-07 0:07

Christian Graus

30-Jun-07 0:07

It's a pretty straightforward question, probably just one function call to do it. I'd answer it, if I knew.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

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