Radgridview with CheckBox - CheckAll and UnCheckAll

[muralitharan]

Hi,

We are using Radgridview with CheckBox and also we have added the CheckAll and UnCheckAll button. We have finished this CheckAll and UnCheckAll functionalities using looping with grid.rows.count, but when we are filter the row it shows the total rows count and also getting the exception like 'Index 145 is either negative or above rows count.'. Refer the below code and kindly let me know how we have to solve this issue.

CheckAll:

for

 

(int i = 0; i < radGrid.Rows.Count; i++)

 

 

 {

    radGrid.Rows[i].Cells[

"-"].Value = Boolean.TrueString;

 

 

     item = radGrid.Rows[i].DataBoundItem;

 

    if (!this.selectedRows.Contains(item))

 

 

 

        this.selectedRows.Add(item);

 

 

 }

 

UnCheckAll:

this

 

.selectedRows.Clear();

 

 

 

for (int i = 0; i < radGrid.Rows.Count; i++)

 

 

 {

         radGrid.Rows[i].Cells[

"-"].Value = Boolean.FalseString;

 

 

 }

 

Regards,
Murali.S

[Nick]

Hi muralitharan,

Thank you for contacting us. Here is a better version of SelectAll method:

private void button1_Click(object sender, EventArgs e)
{
       myGrid.MultiSelect = true;
       myGrid.GridElement.BeginUpdate();

       foreach (DataRow row in ((DataTable)this.myGrid.DataSource).Rows)
       {
           row["B"] = true;
       }

       foreach (GridViewRowInfo info in this.myGrid.Rows)
       {
           info.IsSelected = true;
       }

       myGrid.GridElement.EndUpdate();
}

The UnselectAll is almost the same. You need to use BeginUpdate/EndUpdate to increase the performace e.g. batch operation. Do not hesitate to write me back if you have further question.

Kind regards,
Nick
the Telerik team

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