Currently, I am facing a challenge with dynamically binding a typed list to a GridView control within an asp.net page that is wrapped in an asp:UpdatePanel for Ajax functionality. One of the main requirements is that only one checkbox in the first column can be checked at a time, and when a user checks one checkbox, all others must be unchecked.
Despite attempting to achieve this with client-side script, I have not been successful. In the handler for the GridView’s RowDataBound event, I've tried to add an attribute to the CheckBox within the cell as a solution.
protected void ErrorGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if(e.Row.Cells[0].HasControls())
{
foreach (var control in e.Row.Cells[0].Controls)
{
if (!(control is CheckBox)) continue;
var checkBox = (CheckBox)control;
checkBox.Attributes.Add("CheckedChanged", "errorCheckChanged");
return;
}
}
}
Client-side script is registered in the Page_Load event handler as shown below:
if (!Page.ClientScript.IsClientScriptBlockRegistered("ErrorsCheckBoxHandler")) Page.ClientScript.RegisterClientScriptBlock(GetType(),"ErrorsCheckBoxHandler", "function errorCheckChanged() {window.alert(\"here\"); }");
However, the problem is that the function is not triggered when any checkboxes are clicked. I am seeking guidance on what might be missing here. Additionally, I would like to know the best way to deselect any other checkboxes that are checked in the target column.
My plan is to modify the 'errorCheckChanged' function to accept a parameter (the checkbox object). By changing the attribute addition signature as follows:
checkBox.Attributes.Add("CheckedChanged", "errorCheckChanged(this)");
My hope is to:
(1) Determine if the checkbox state is 'checked'. If it is, continue to the next steps:
(2) Identify the checkbox parent (the cell) and determine the affected GridView Row.
(3) Loop through all rows to set the checkboxes to 'Checked=false' except for the current row.
Would this approach be considered the right way to go?
Thank you,
Grant