Change Column Name in HeaderContextMenu

[Miriam]

Hi,

I have a RadGrid in my page with "EnableHeaderContextMenu" set to true. 

 

I want to change the texts for the columns in the HeaderContextMenu.

With an older telerik version the code snippet below the function was working, now with the latest Version 2015.2.826.45 it doesn't work anymore.  

 

this.GridView.HeaderContextMenu.ItemClick += this.pContextMenu_ItemClick;

 

void HeaderContextMenu_PreRender(object sender, EventArgs e)
        {
            // Correct the column names for Context Menue
            Telerik.Web.UI.GridHeaderContextMenu pContextMenue = sender as Telerik.Web.UI.GridHeaderContextMenu;
            Telerik.Web.UI.RadMenuItem pColumnsContextMenu = pContextMenue.FindChildByValue<Telerik.Web.UI.RadMenuItem>("ColumnsContainer", true);

            foreach (Telerik.Web.UI.RadMenuItem pItem in pColumnsContextMenu.Items)
            {
                pItem.Text = _Regex.Replace(pItem.Text, String.Empty);
            }
        }

 

Kindly help us in solving this issue.

Regards, 

Miriam

[Konstantin Dikov]

Hello Miriam,

In order to change the text of the column names when there are checkboxes beside the names, you need to change the Text property of the CheckBox control directly:

<telerik:RadGrid runat="server" ID="RadGrid1" OnNeedDataSource="RadGrid1_NeedDataSource" EnableHeaderContextMenu="true" EnableHeaderContextFilterMenu="true">
</telerik:RadGrid>

And the code-behind:

protected void Page_Load(object sender, EventArgs e) {
    RadGrid1.HeaderContextMenu.PreRender += HeaderContextMenu_PreRender;
}

void HeaderContextMenu_PreRender(object sender, EventArgs e)
{
    // Correct the column names for Context Menue
    Telerik.Web.UI.GridHeaderContextMenu pContextMenue = sender as Telerik.Web.UI.GridHeaderContextMenu;
    Telerik.Web.UI.RadMenuItem pColumnsContextMenu = pContextMenue.FindChildByValue<Telerik.Web.UI.RadMenuItem>("ColumnsContainer", true);

    foreach (Telerik.Web.UI.RadMenuItem pItem in pColumnsContextMenu.Items)
    {
        if (pItem.Controls.Count < 1)
        {
            pItem.Text = pItem.Text.Replace(pItem.Text, "");
        }
        else
        {
            (pItem.Controls[0] as CheckBox).Text = pItem.Text.Replace(pItem.Text, "");
        }
    }
}

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    DataTable table = new DataTable();
    table.Columns.Add("ID", typeof(int));
    table.Columns.Add("FirstName", typeof(string));
    table.Columns.Add("LastName", typeof(string));
    table.Columns.Add("Age", typeof(int));
    table.Columns.Add("Date", typeof(DateTime));
    table.Columns.Add("BoolValue", typeof(Boolean));
    for (int i = 0; i < 5; i++)
    {
        table.Rows.Add(i, "FirstName" + i, "LastName" + i, 20 + i, DateTime.Now.AddDays(i), i % 2 == 0);
    }

    (sender as RadGrid).DataSource = table;

}

Hope this helps.


Regards,
Konstantin Dikov
Telerik