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Hi All,
The Pen and the Brush objects' Color property needs to be set when they are created. The problem is the color values one can use is very limited. Is there a way to send the color code to the Pen or the Brush object dynamically after choosing a color from a palette? Thanks in advance for your reply.
modified 23-May-13 7:03am.
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You do that by creating a new Pen/Brush with that selected color (do not forget to Dispose() of the old Pen/Brush objects for freeing the resources).
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Hi, thanks for responding. I was already aware of setting the color of the pen or the brush object using the Color.color name method. What I would like to do instead of using color names such as blue, green, red, etc. is pass in the RGB code to the property like the following
Pen myPen = new Pen;
myPen = System.Drawing.Color.F08080;
modified 23-May-13 7:04am.
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Have a look at the FromArgb[^] method of the Color struct, you can set it to anywhere in the 32bit ARGB range. So, you set the Color and pass that to the Pen...
Edit:
using(Pen pen = new Pen(Color.FromArgb(0)))
{
}
replacing the zero with the value you want
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Hi, thanks for your reply. The example in the MSDN below suggests that I must manually set the value of
FromArgb():
public void FromArgb4(PaintEventArgs e)
{
Graphics g = e.Graphics;
// Transparent red, green, and blue brushes.
SolidBrush trnsRedBrush = new SolidBrush(Color.FromArgb(0x78FF0000));
SolidBrush trnsGreenBrush = new SolidBrush(Color.FromArgb(0x7800FF00));
SolidBrush trnsBlueBrush = new SolidBrush(Color.FromArgb(0x780000FF));
}
You've just given me an idea; I'm going to allow users to set the color of the brush or pen object by clicking on the color palette object. This will grab the color code then pass it as a parameter to the FromArgb4() method.
modified 23-May-13 7:03am.
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That's the correct way to do it.
Make sure you put all those brushes in using block(s) or explicitly call Dispose() on each one before you exit your method - unless you are caching them in private fields, in which case you need to make your class IDisposable and implement the Dispose pattern.
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Hi,
I need an additional button including a handler in a System.Windows.Forms.SaveFileDialog() to do customized processing instead of a "Save" as implemented by default. To complicate matters, this dialog is opened from within WPF since WPF itself lacks such dialog.
What are the pieces needed to implement such custom SaveFileDialog(), please?
Thank you!!
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You will need to build your own dialog, just like any other dialog you would build. So you will need to identify the controls you see in the system dialog and reproduce that yourself.
Never underestimate the power of human stupidity
RAH
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You cannot do much with the existing control.
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Create your own custom dialog class that inherits FileDialog[^].
Use the best guess
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i search google first to get any ready made sample for numeric pager for win form but unfortunately i found none. many exist for web application. so i have decided to develop my own. i have take one user control and i want to add some label on the user control at run time for simulating numeric pager link.
like << < 1 2 3 4 5 > >>
here is my code so far
public partial class PagerBar : UserControl
{
public PagerBar()
{
InitializeComponent();
}
int totalrecords = 0;
public int TotalRecords
{
get { return totalrecords; }
set { totalrecords = value; }
}
int recordsperpage = 0;
public int RecordsPerPage
{
get { return recordsperpage; }
set { recordsperpage = value; }
}
int curpage = 0;
public int CurrentPage
{
get { return curpage; }
set { curpage = value; }
}
int maxpagerlink = 0;
public int MaxPagerLink
{
get { return maxpagerlink; }
set { maxpagerlink = value; }
}
public bool HasPreviousPage
{
get
{
return (CurrentPage > 1);
}
}
public bool HasNextPage
{
get
{
return (CurrentPage + 1 <= RecordsPerPage);
}
}
int pagecount = 0;
public int PageCount
{
get
{
pagecount = TotalRecords > 0 ? (int)Math.Ceiling(TotalRecords / (double)RecordsPerPage) : 0;
return pagecount;
}
}
public void BuildPager(int CurrentPage)
{
if (CurrentPage >= MaxPagerLink)
{
}
else
{
}
}
}
my first prev,next & prev button will be fixed. i will not generate these button at run time. i want to generate only numeric link like 1 2 3 4 5 etc at run time on user control.
one thing i need to fix that number of pager bar is will be fixed in my case and that is 5. i want to show always 5 pager link like 1 2 3 4 5 or 6 7 8 9 10 etc.
suppose total records is 36 and i want to show 10 records per page so 4 pager link i need to generate at run time. the right logic is not coming to my mind to generate pager link in such a way if number of records is 110 then everything should be handle properly. if total records is 110 and records per page is 10 then total pager bar should be 11 but i want to show only 5 at a time. first time 1 2 3 4 5 when user click on 5th pager bar and next time click on next button then pager link will be 6 7 8 9 10. this way i want to show pager link but right logic is not coming to mind to generate the way i want to display pager link. it will be great help if some one help me to handle generation of 5 pager link always.
tbhattacharjee
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Hi friends,
I have used below mentioned article to launch an application using windows service.
[^]
however after using the above mentioned code i was able to start the application written in c sharp. but as soon as its get started the main form is getting minimized and even i am not able to get the icon into system tray. however i can view the application into Windows 7 task manager. Let me know if you can help me out the same. Waiting for your positive reply.
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If you have a question relating to an article, you should ask in the forum at the end of the article. It's highly unlikely that the author will happen to walk on by this post and open it up.
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Hello everyone, thank you in advance for your help.
I want to make invisible the selected row of my datagridview but I have a problem with my code
1 - When I do this
dataGridView1.CurrentCell = null;
dataGridView1.SelectedRows [0] Visible = false.;
Index was out of range. Must be non-negative and less than the size of the collection.
2 - When I do this
dataGridView1.SelectedRows [0] Visible = false.;
Row associated with the currency manager's position cannot be made invisible.
What should I do. Thank you
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1. Make sure that you actually have a collection of SelectedRows[^].
2. Not sure, but presumably this has something to do with your data binding.
Use the best guess
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it's ok thank u
int k = dataGridView1.SelectedRows[0].Index;
dataGridView1.CurrentCell = null;
dataGridView1.Rows[k].Visible = false;
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Hi.
I'm trying to open/edit and print a excel file in a pc without office istalled.
how i do that?
thanks.
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To edit the file from code, you can use NPOI[^], or EPPlus[^] for Excel 2007/2010/2013 files. Both libraries are free and open-source.
However, neither library seems to support printing the file. You might need to look for a commercial library to do that.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Hello Friends,
Thanks in Advance... I am using VS2012 ON WIN7 as my development tool.
I want to get data from C++ into my C# 2D arrays, Arrays are member of strucutre.
I am getting data fine in case of Single dimension arrays and basic data types.
Below is the sample code:-
I have a C# strcuture having 3-4, multidimensional array example.
[StructLayout(LayoutKind.Sequential)]
public struct CompMultiArray
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2 * 200)]
public int [,] tempVacData;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2 * 200)]
public int [,] tempFuncData;
};
Public void GetDataFromUnmanagedCode()
{
CompMultiArray cmpGetData = new CompMultiArray();
cmpGetData .tempVacData = new int[2, 200]; // Allocating or not allocating has no effect
cmpGetData .tempFuncData= new int[2, 200]; // Allocating or not allocating has no effect
CPPClass.FillData(ref cmpGetData);
}
C++ side
struct CompMultiArray
{
int tempVacData[2][200];
int tempFuncData[2][200];
};
void FillData(CompMultiArray& cmData)
{
for(int i =0; i< 2; ++i)
{
for(int j = 0; j < 200; ++j)
{
cmData.tempVacData[i][j] = 100;
cmData.tempFuncData[i][j] = 200;
}
}
}
If I see data in C# side after getting from unmanaged code in Windows->Memory (VS2012), I can see correct data in memory. GC Code to get memory address
GCHandle gch = GCHandle.Alloc(cmpGetData.tempVacData, GCHandleType.Pinned);
// Get a pointer to the array data...
IntPtr pArrayData = gch.AddrOfPinnedObject();
// Via the debugger's memory viewer, confirm
// that the data is laid in memory in sequence.
gch.Free();
But using indexing, i cannot get any data.
for(int i = 0; i < 2; ++i)
{
for(int j = 0; j < 200; ++j)
{
cmpGetData.tempVacData[i,j];
cmpGetData.tempFuncData[i,j]
}
}
please ignore, Dllimport etc. all things are working fine.
please guide me.
Thanks,
Subhash
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This may not be possible in your case, but since you have provided the C++ code, have you tried compiling the C++ part as C++/CLI and using managed arrays in the C++ part? You could then make the C++ part a DLL that is referenced in your C# project.
I do this all the time in order to get over the difficult unmanaged/managed boundary.
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Class a
{
a obj=new a();
}
in this case we are calling the default constructor
but
class a
{
public a(int i)
{
console.writeline(i);
}
a obj=new a(); //Gives error during compilation
}
In this case we can't call default constructor after creating a custom constructor.
But why it happns???
Why we cant use default constructor in this case
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Because it doesn't have one.
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