DataGridView seems to lose databinding - C# Discussion Boards

Re: How to add a MSProject to other MSProject

Cracked-Down23-Mar-09 2:32

Cracked-Down

23-Mar-09 2:32

why do yopu want to do this??

do you want to use the functionalities defined in aa.mpp in your master.mpp??

Re: How to add a MSProject to other MSProject

fan15823-Mar-09 15:51

fan158

23-Mar-09 15:51

if add aa.mpp into master successfully, then only change content of aa.mpp, the master.mpp will get an new change about aa.mpp.
I import "Microsoft.Office.Interop.MsProject", but I do not known use which method. all method and class in this link http://msdn.microsoft.com/zh-cn/library/aa195459(en-us,office.11).aspx[^]

Re: How to add a MSProject to other MSProject

moon_stick23-Mar-09 2:39

moon_stick

23-Mar-09 2:39

I've not done any coding with Project but have had some success using Excel and Word etc. A good place to start would probably be MSDN: Project Solutions[^]

At first glance, the documentation looks pretty thin so you might have a bit of a job ahead - good luck!

It definitely isn't definatley

Re: How to add a MSProject to other MSProject

fan15823-Mar-09 15:56

fan158

23-Mar-09 15:56

Special thanks for your naswer Poke tongue | ;-P

Crystal Report Page Setup

Yathish hatter23-Mar-09 0:00

Yathish hatter

23-Mar-09 0:00

Hi,
In my C#.Windows app.I want print a slip of size of width 55mm and height 45 mm.
I am using crystal Reports printing this width and height text.I am using Canon printer.
In crystal Reports Only The 'Card'Size which takes 148*125 mm.And there is no option in
printer also.It prints same 55 and 45 mm text.But printed paper is bit lentheier than test. So is there any way that can i fix through by writing code.
please....

Re: Crystal Report Page Setup

Henry Minute23-Mar-09 5:09

Henry Minute

23-Mar-09 5:09

Ah a new homework topic?

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

crystal reports

ShivarajKumar22-Mar-09 23:52

ShivarajKumar

22-Mar-09 23:52

how to set custom paper size of crystal report programatically using c#

DataGridView seems to lose databinding

Nigel Mackay22-Mar-09 23:37

Nigel Mackay

22-Mar-09 23:37

Hi
I have a gridview, dgvDepartments linked to a dataset, dsDepartments.

bool InitialiseDepartments()
{
   rmDepartments = (IUserList)Activator.GetObject(typeof(IUserList),
		      System.Configuration.ConfigurationManager.AppSettings
		      ["UserListUrl"]);
   try
   {
      dsDepartments = null;
      dsDepartments = rmDepartments.GetDepartments();
      bsDepartments.DataSource = dsDepartments;
      bsDepartments.DataMember = "Departments";
      dgvDepartments.DataSource = bsDepartments;
      dgvDepartments.Refresh();
   }
   catch (Exception ex)
   {
      ShowError("Unable to load Departments. " +
                "Server possibly not running. \n\n" +
		"System Error: " + ex.Message);
      return false;
   }
   return true;
}

If I make changes to the gridview and click SaveChages, the changes are saved.
If I then make more changes, when I click SaveChanes, it reports No changes to save. This is from the code:

Validate();
BindingContext[dsDepartments, "Departments"].EndCurrentEdit();
DataSet changes = dsDepartments.GetChanges();
if(changes != null)

which resolves to false. To me, this means that the link between the gridview and the dataset has gone. Here is the code that executes when a change is saved (Without try blocks and error handling):

dsDepartments.AcceptChanges();
dsDepartments = null;
dsDepartments = rmDepartments.GetDepartments();//  Do this because of identity column which must be updated
dgvDepartments.Refresh();

I can't find any changes to gridview datasource and the like, but once I have saved a change, changes in the gridview are no longer reflected in the dataset.
I can't think what value I should monitor to see where the link gets broken.

Re: DataGridView seems to lose databinding

Spunky Coder23-Mar-09 0:23

Spunky Coder

23-Mar-09 0:23

Well I'm not quite sure of the solution but I think when you make changes and use the DataSet.AcceptChanges() the positions in the BindingContext will not be set properly..I guess you have to set the position using BindingManagerBase so as to reset the cursor to starting row... Try google on this...

"Don't worry if it doesn't work right. If everything did, you'd be out of a job." (Mosher's Law of Software Engineering)

Weird behaviour

Mustafa Ismail Mustafa22-Mar-09 23:23

Mustafa Ismail Mustafa

22-Mar-09 23:23

I have the following snippets in an MDI form and a child

MDI

private void mnuFileNew_Click(object sender, EventArgs e)
{
    //create a new Item form
    frmAddItem addItem = new frmAddItem();

    addItem.MdiParent = this;
    addItem.ShowInTaskbar = false;
    addItem.Show();
}

Child

private void frmAddItem_Load(object sender, EventArgs e)
{
    //GetEnumerations
    GetEnumerations();
    //Bind the Combos
    BindCombos();

    //set the length of the barcode textbox
    int maxLength = int.Parse(RegistryHelper.ReadSettingFromRegistry(@"Inventory\Barcode\C39\Length"));
    txtBarcode.MaxLength = maxLength;
}

Now, the funny part is that the moment the debugger reaches the

GetEnumerations()

in the child's load section, the code just exits the event handler back to the parent. Anyone have a clue why? I'll add to the plot and say that the last line references a dll that reads a value from the registry. Works like a swiss watch but the GetEnumerations method which reads from the DB doesn't seem to function.

Re: Weird behaviour

DaveyM6922-Mar-09 23:59

DaveyM69

22-Mar-09 23:59

Strange

I assume you've set a breakpoint at BindCombos(); and it's never reached?

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Weird behaviour

Mustafa Ismail Mustafa23-Mar-09 0:28

Mustafa Ismail Mustafa

23-Mar-09 0:28

Yep. I've tried restarting the IDE and the computer but still the same.

Re: Weird behaviour

DaveyM6923-Mar-09 0:53

DaveyM69

23-Mar-09 0:53

The problem has to lie in the GetEnumerations method - though I can't imagine what could be in it that would cause the behaviour you're experiencing!

I'd put beakpoints all over that method to find out what's going on.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Weird behaviour

Mustafa Ismail Mustafa23-Mar-09 4:32

Mustafa Ismail Mustafa

23-Mar-09 4:32

See, that's the thing. I've already done that. Its not even accessing the method. It just reverts back to the MDI form's code. It just exits the Child's load event handler. The form displays fine and function alright (I checked other stuff in the form and it works perfectly fine).

Its driving me insane.

And I'm really sorry for the late reply but the electricity was out for a few hours.

Re: Weird behaviour

DaveyM6923-Mar-09 5:06

DaveyM69

23-Mar-09 5:06

Are you absolutely sure that the handler is being called at all?
Maybe you (or the designer) have deleted the line that adds the handler method to the delegate's invocation list, or a different method is in there?

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Weird behaviour

Mustafa Ismail Mustafa23-Mar-09 5:25

Mustafa Ismail Mustafa

23-Mar-09 5:25

OK. I went a few levels back and caught the very basic exception being thrown (it turns out that there is an exception being thrown!)

I'm getting a:

{System.TypeLoadException: Could not load type 'RCH.BL.Inventory.ItemCategory' from assembly 'BL, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at RCH.Inventory.Forms.frmAddItem.GetEnumerations()
   at RCH.Inventory.Forms.frmAddItem.frmAddItem_Load(Object sender, EventArgs e) in C:\Data\Work\Asclepius\trunk\src\Inventory\Forms\frmAddItem.cs:line 115}

Now why would this happen?

Thanks to JSOP for the tip! I'm posting this to him as well

Re: Weird behaviour

#realJSOP23-Mar-09 2:42

#realJSOP

23-Mar-09 2:42

Add a try/catch block around the call to GetEnumerations.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: Weird behaviour

Mustafa Ismail Mustafa23-Mar-09 5:26

Mustafa Ismail Mustafa

23-Mar-09 5:26

OK. I went a few levels back and caught the very basic exception being thrown (it turns out that there is an exception being thrown!)

I'm getting a:

{System.TypeLoadException: Could not load type 'RCH.BL.Inventory.ItemCategory' from assembly 'BL, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at RCH.Inventory.Forms.frmAddItem.GetEnumerations()
   at RCH.Inventory.Forms.frmAddItem.frmAddItem_Load(Object sender, EventArgs e) in C:\Data\Work\Asclepius\trunk\src\Inventory\Forms\frmAddItem.cs:line 115}

Now why would this happen?

Thanks to your tip, I'm reminded how to find a bleeding error. Thanks.

Re: Weird behaviour

#realJSOP23-Mar-09 9:03

#realJSOP

23-Mar-09 9:03

Maybe you neglected to do a build all and then update all the assembly binaries.

Re: Weird behaviour

Mustafa Ismail Mustafa23-Mar-09 9:27

Mustafa Ismail Mustafa

23-Mar-09 9:27

I've done that at least a dozen times since I've found out the error.

As is, I'm at folks now so I'm working from my laptop and everything is fine on this machine. When I get back home to my proper dev box I'm going to try that again and see what the heck is going on.

Thanks for everything John

How to find multiple occurrence in a string.

CodingLover22-Mar-09 23:22

CodingLover

22-Mar-09 23:22

Hi all,

I want to find multiple occurrence of a string.

I used string.Contains() method and it returns only the first occurrence. I want to find how many occurrence and add some characters in that index. How can I do that?

Thanks Smile | :)

I appreciate your help all the time...
CodingLover Smile | :)

Re: How to find multiple occurrence in a string.

Spunky Coder22-Mar-09 23:34

Spunky Coder

22-Mar-09 23:34

Contains() internally calls IndexOf() method...For finding the multiple occurrences use IndexOf() and loop through the entire string.

"Don't worry if it doesn't work right. If everything did, you'd be out of a job." (Mosher's Law of Software Engineering)

Re: How to find multiple occurrence in a string.

Luc Pattyn23-Mar-09 1:28

Luc Pattyn

23-Mar-09 1:28

or have a look at Regex class. It may be more complex, it offers lots of functionality.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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Re: How to find multiple occurrence in a string.

#realJSOP23-Mar-09 2:52

#realJSOP

23-Mar-09 2:52

Try this:

string text = "one two three one oneone, someone for";
string wordToFind = "one";
int wordCount = 0;
int pos = 0;
while (pos >= 0)
{
	pos = text.IndexOf(wordToFind);
	if (pos >= 0)
	{
		wordCount++;
		text = text.Substring(pos + wordToFind.Length);
	}
}

The example above should result in a wordCount of 5.

Re: How to find multiple occurrence in a string.

#realJSOP23-Mar-09 3:17

#realJSOP

23-Mar-09 3:17

Here's a variation of the answer I gave previously. In this example, I supply code to count instances of the exact word.

string text = "one two three one oneone, someone for";
string alphaNumbers = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
string wordToFind = "one";
bool caseSensitive = false;
int wordCount = 0;
int pos = 0;

string text2 = text;
if (!caseSensitive)
{
	text2 = text2.ToUpper();
	wordToFind = wordToFind.ToUpper();
}
while (pos >= 0)
{
	pos = text2.IndexOf(wordToFind);
	if (pos >= 0)
	{
		wordCount++;
		text2 = text2.Substring(pos + wordToFind.Length);
	}
}

// now count only instances of the exact word
wordCount = 0;
text2 = text;
if (!caseSensitive)
{
	text2 = text2.ToUpper();
	wordToFind = wordToFind.ToUpper();
}
string[] parts = text2.Split(' ');
foreach (string part in parts)
{
	if (part == wordToFind)
	{
		wordCount++;
	}
	else
	{
		char lastChar = part[part.Length - 1];
		if ((part.Length == wordToFind.Length + 1) && (alphaNumbers.IndexOf(lastChar) == -1)) 
		{
			wordCount++;
		}
	}
}

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