Re: Datagridview, disable row selection - C# Discussion Boards

3-Mar-08 1:44

Hello,

I have a question regarding a row selection of the datagridview control.

How can I prevent that the user can click on another row than the row where my current cell is (in editing mode)

So I have a row with 4 cell's for example, the row is selected, and the first cell is in editing mode.
When I click another row other than the one I'm editing, the focus goes to this other row.

How can I prevent that in code?

Thank you!

Greetings

Xmen Real 3-Mar-08 4:51

3-Mar-08 4:51

use this, to know about editing mode
DGV[ColumnIndex, RowIndex].IsInEditMode

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

alexander_perdum3-Mar-08 5:01

3-Mar-08 5:01

Thank you,

I can figure out if the cell is in edit mode, but if this is true, I may not be able to select other rows than the row where my editing cell is in .. ?

Is there a way I can do that?

Thanks

Xmen Real 3-Mar-08 5:12

3-Mar-08 5:12

there are vary events that can be use, try
CellLeave and CellEnter

alexander_perdum3-Mar-08 5:21

3-Mar-08 5:21

I've used this events, and with those, I can capture if I clicked on the other row etc.

But how can I prevent that the row I've clicked is not selected?

I've tried:

if (e.RowIndex != previous_line)
{
// There may not be clicked
MessageBox.Show("You are already editing a machine");
grid_machines.Rows[previous_line].Selected = true;
}

this results in the previous line, which is now selected again, but the arrow on the rowheader is still on the 'new' clicked row. So my old line is selected, but the new line has the editing arrow..?

Thank you

Xmen Real 3-Mar-08 5:26

3-Mar-08 5:26

write

dataGridView1.SelectedCells = null;

dataGridView1.SelectedRows = null;

before select the previous row

hope it will work

alexander_perdum3-Mar-08 5:37

3-Mar-08 5:37

Those properties are get only, not set?

I understand what you mean though.

Would it be possible to override the event where the 'selection' of the row happens?
So that I look for my conditions, if it's false, then select the new clicked row ...?

Thank you

Xmen Real 3-Mar-08 14:26

double click on a ListViewItem

3-Mar-08 14:26

ooppss...i didnt check them, but here is working one

DGV.ClearSelection();

amit_833-Mar-08 1:44

amit_83

3-Mar-08 1:44

Hi all,

When I double click on a ListViewItem, I don't want the checked property
of the item to change. By default, this does happen and I can't see a way
of disabling this behaviour.

Thanks in advance.

amit

Re: double click on a ListViewItem

DaveyM693-Mar-08 2:29

Re: double click on a ListViewItem

3-Mar-08 2:29

I don't think you can.

The events occur in this order:

ItemCheck
ItemChecked
DoubleClick
MouseDoubleClick

so it's not possible to tell whether the change is occurring because of the double click until after the check has been changed.

Dave

mav.northwind3-Mar-08 19:36

mav.northwind

3-Mar-08 19:36

Hi!
Trying to set the checked property in the CheckedChanged event doesn't work directly, but with a litte trick you can achieve this:
Call a delegate for resetting the Checked state using BeginInvoke(), so that the code is executed after the CheckedChanged event handler is through.

Regards,
mav

--
Black holes are the places where God divided by 0...

Get Namespace Name [modified]

DaveyM693-Mar-08 1:30

3-Mar-08 1:30

I'm trying to get the namespace that a class resides in within a static method of that class.

this.GetType().Namespace; works if the method is not static but obviously this is not valid in a static method.

Edit:
I've found that this way works but I'm sure there's a better way!

private class dummy
{ }

static string GetNamespace()
{
    dummy temp = new dummy();
    return temp.GetType().Namespace;
}

Dave

modified on Monday, March 3, 2008 7:52 AM

TJoe3-Mar-08 2:07

TJoe

3-Mar-08 2:07

You can simply use typeof(MyClass).Namespace.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

DaveyM693-Mar-08 2:35

Re: Get Namespace Name - Solved

3-Mar-08 2:35

Thanks Tom, it works and will solve my problem but I was looking for a more general way if there is one.

The static method must already be in a class, so surely it should know what MyClass is without me having to specify it?

Dave

DaveyM693-Mar-08 3:09

3-Mar-08 3:09

This works!
System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Namespace;

Dave

Pete O'Hanlon3-Mar-08 3:09

Pete O'Hanlon

3-Mar-08 3:09

You could always do this with the StackFrame. Here's a quick sample:

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

namespace TestApp
{
  class Program
  {
    static void Main(string[] args)
    {
      StackFrame sf = new StackFrame();

      Console.WriteLine(sf.GetMethod().DeclaringType.Namespace);
    }
  }
}

GetMethod has a property called DeclaringType which returns the type of the class the method is implemented in, and from there it's trivial to find the namespace.

Deja View - the feeling that you've seen this post before.

My blog | My articles

DaveyM693-Mar-08 3:21

3-Mar-08 3:21

Cheers Pete, I actually found and posted the solution at the same time as you!

I used System.Reflection.MethodBase.GetCurrentMethod() instead of StackFrame.GetMethd()

Are there any advantages of either one?

Dave