set the readonly property to textbox in gridview using dropdownlist

protected void Change(object sender, EventArgs e)
    {
          GridViewRow row = GridView1.SelectedRow;
            DropDownList dlMng = (DropDownList)sender;
            TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");
            if (dlMng.SelectedIndex == 0)
            {
                txtreason.ReadOnly = true;
            }
            if (dlMng.SelectedIndex == 1)
            {
                txtreason.ReadOnly = false;
            }
        }

This is my mycode:

In this code i had a error at this line:

     TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");

The error is:

Object reference not set to an instance of an object.

any one pls help me...

Re: set the readonly property to textbox in gridview using dropdownlist

The findcontrol couldn't able to find the textbox. Do check whether you are getting Gridview.Selectedrow

It should return you GridViewDataRow

hope it helps, thanks.

Re: set the readonly property to textbox in gridview using dropdownlist

I want to insert bulk from my grid view...

Now i deleted seletced row from my code now it shows the same error at 'txtreason'

there is any another way?

Re: set the readonly property to textbox in gridview using dropdownlist

Are you trying to get the single row? or you want to loop thru all the rows?

TextBox txtreason = (TextBox)GridView1.Rows[0].FindControl("txtreason");

Try this....Please clarify whether the Dropdown will be avlb for each rows? or on the header

thanks.

Re: set the readonly property to textbox in gridview using dropdownlist

Thanks its working fine for single row where row id is 0, but i need to select individual rows every time why because dropdown is available in each row...

for example in my grid i have 10 rows when ever i select 1st row that first row textbox only become readonly...

pls help me for this...

Re: set the readonly property to textbox in gridview using dropdownlist

I think the onchange event is mapped to your dropdown selectedindex changed?

just include this line in the event

DropDownList ddl = (DropDownList)sender;
GridViewRow row = (GridViewRow)ddl.Parent.Parent;
int idx = row.RowIndex;

Can you check this? hope it helps,thanks

Re: set the readonly property to textbox in gridview using dropdownlist

protected void Change(object sender, EventArgs e)
    {
            DropDownList ddl = (DropDownList)sender;
            GridViewRow row = (GridViewRow)ddl.Parent.Parent;
            int idx = row.RowIndex;
            DropDownList dlMng = (DropDownList)sender;
            TextBox txtreason = (TextBox)GridView1.Rows[idx].FindControl("txtreason");
            if (dlMng.SelectedIndex == 0)
            {
                txtreason.ReadOnly = true;
            }
            if (dlMng.SelectedIndex == 1)
            {
                txtreason.ReadOnly = false;
            }
        }

Re: set the readonly property to textbox in gridview using dropdownlist

Try this Code:

protected void Change(object sender, EventArgs e)
    {
          GridViewRow row = GridView1.SelectedRow;
            DropDownList dlMng = (DropDownList)sender;
            TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");
            if (dlMng.SelectedItem = 0) // OR dlMng.SelectedValue = 0
            {
                txtreason.ReadOnly = true;
            }
            if (dlMng.SelectedItem = 1) // OR dlMng.SelectedValue = 1
            {
                txtreason.ReadOnly = false;
            }
        }

Re: set the readonly property to textbox in gridview using dropdownlist

Thank you....

Its working fine....

Re: set the readonly property to textbox in gridview using dropdownlist

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