Question

I have two radgrids on my aspx page: Log and LogDetails.

When I click on a row on Log grid, I would like LogDetails to refresh with the logid of LogGrid. But the details grid is not refreshing.

Please help me. Here is my code. Thanks

     protected void OnLogGridNeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
    {
        var logs = LogManager.FindLog();

        var sortedlogs = from l in logs
                         orderby l.LogId descending
                         select l;

        grdLogGrid.DataSource = sortedlogs;

    }

    protected void OnLogDetailGridNeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
    {
        int logid = 0; 

        if (grdLogGrid.SelectedValue != null)
            logid = Convert.ToInt32(grdLogGrid.SelectedValue.ToString());


        var logDetails = LogManager.FindLogDetail();
        var logDetail = from ld in logDetails
                        where ld.LogId == logid
                        select ld;

        grdLogDetailGrid.DataSource = logDetail;

    }

    protected void OnLogGridItemCommand(object sender, Telerik.Web.UI.GridCommandEventArgs e)
    {
        grdLogDetailGrid.Rebind();
    }

Answer 1

To pass LogId value to details grid better to use DataKeyNames property of MasterTableView to set unique identifier property name and SelectedValue property of the master RadGrid to get it’s value in code-behind. Check this demo: Grid / Master/Detail Grids

As you use advanced data binding you can access SelectedValue property of the master grid just in detail’s grid NeedDataSource event handler without handling ItemCommand event of the master grid.