Retain dropdown values in gridview

Hi,

I tried it and I'm not able to edit the rows.


 
 
 
 
 
 
 

I think you are handling checked event in OnCheckedChanged() which is a javascript client side function 

Then actually you can remove AutoPostBack="true" from checkbox to avoid postback of the page. 

Your value is getting lost because of the postback

I am using this below code to check and uncheck grid rows for editing. So when I click on checkbox I am not able to retail the gridview selected dropdown values. For ex: The third row which has a column called scope has a value No. But when I click onthe checkbox the values isYes since this is the order I have binded in the dropdown.

 protected void OnCheckedChanged(object sender, EventArgs e)
        {
            bool isUpdateVisible = false;
            CheckBox chk = (sender as CheckBox);
            if (chk.ID == "chkAll")
            {
                foreach (GridViewRow row in Updates.Rows)
                {
                    if (row.RowType == DataControlRowType.DataRow)
                    {
                        row.Cells[0].Controls.OfType().FirstOrDefault().Checked = chk.Checked;
                    }
                }
            }
            CheckBox chkAll = (Updates.HeaderRow.FindControl("chkAll") as CheckBox);
            chkAll.Checked = true;
            foreach (GridViewRow row in Updates.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    bool isChecked = row.Cells[0].Controls.OfType().FirstOrDefault().Checked;
                    for (int i = 1; i < row.Cells.Count; i++)
                    {
                        if (row.Cells[i].Controls.OfType().ToList().Count > 0)
                        {
                            row.Cells[i].Controls.OfType().FirstOrDefault().Visible = !isChecked;
                        }
                        if (row.Cells[i].Controls.OfType().ToList().Count > 0)
                        {
                            row.Cells[i].Controls.OfType().FirstOrDefault().Visible = isChecked;
                        }
                        if (row.Cells[i].Controls.OfType().ToList().Count > 0)
                        {
                            row.Cells[i].Controls.OfType().FirstOrDefault().Visible = isChecked;
                        }
                        if (isChecked && !isUpdateVisible)
                        {
                            isUpdateVisible = true;
                        }
                        if (!isChecked)
                        {
                            chkAll.Checked = false;
                        }
                    }
                }
            }
            btnSave.Visible = isUpdateVisible;
        }

can you plz provide more details.