MDI child form with data grid view

Question

4.50/5 (2 votes)

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when i bind the data in the datagrid programmatically and deselect first cell programmatically by this code .

C#

dgv.rows[0].selected= false;

when i open the form it select the first sell as always!
i tried many and many even i tried it in VS 2012 .
still a problem ! why MDI have a bug like that !?
it worked whin i make it normal form not MDI but i want it in mdi any help ?

Posted 1-Aug-12 22:34pm

Ahmad Abd-Elghany

Updated 2-Aug-12 5:40am

v4

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obp42 · Accepted Answer · 2012-08-02T06:02:00

Solution 1

Try this:

C#

dgv.CurrentCell = dgv[0, 0];
dgv.Rows[0].Selected = false;

It seems that CurrentCell for the grid is null until it is displayed or CurrentCell is set programatically and in the past I've been unable to use Selected = true/false until first setting a CurrentCell.

I think you might want to do this in your DataBindingComplete event. So using the code you gave in the comment, it would look something like

private void ItmGroupfrm_Load(object sender, EventArgs e)
{
  using DataTable dt = itmGrp.SelectItemGroup());
  {
    dgv.DataBindingComplete += 
      new DataGridViewBindingCompleteEventHandler(dgv_DataBindingComplete);
    dgv.DataSource = dt;
  }
}

void dgv_DataBindingComplete(object sender,
  DataGridViewBindingCompleteEventArgs e)
{
  dgv.CurrentCell = dgv[0, 0];
  dgv.Rows[0].Selected = false;
}

Posted 2-Aug-12 6:02am

obp42

Updated 2-Aug-12 10:20am

v3

Comments

Ahmad Abd-Elghany 2-Aug-12 15:19pm

thanx but its still sellected it !
the problem not in the code, its with the mdi and the datagridview !
when i make it normal form its working great !

obp42 2-Aug-12 15:48pm

You should add at least a little more code to your question. Show us where you are calling this line, etc. Otherwise I don't know how much more anyone is going to be able to help you.

Ahmad Abd-Elghany 2-Aug-12 15:56pm

from the parent form i call my form bt this code .
Forms.ItmGroupfrm frm = new Forms.ItmGroupfrm();
frm.MdiParent = this;
frm.Show();

private void ItmGroupfrm_Load(object sender, EventArgs e)
{
BindDgv();
}

and bind method here :
private void BindDgv()
{
using (DataTable dt = itmGrp.SelectItemGroup())
{
dgv.DataSource = dt;
if (dt.Rows.Count > 0)
{
dgv.CurrentCell = dgv[0, 0];
dgv.Rows[0].Selected = false;
}
}

}
when i call it from the main by this code :
Forms.ItmGroupfrm frm = new Forms.ItmGroupfrm();
frm.Show();
the code that deselect the data work perfectly !

obp42 2-Aug-12 16:12pm

I updated my answer for you, take a look and let me know if it works.

ashumeerut 27-Sep-13 6:25am

I have same sort of problem sir , which u have solved , but where is ur answer i can't see it, u have written that "I updated my answer for you, take a look and let me know if it works." but where is the updated answer. please help sir

Ahmad Abd-Elghany 3-Aug-12 0:28am

WOW You Are my super man :D :D thanx man

obp42 3-Aug-12 9:56am

I'm glad I was able to help.