You can use the approach from the forum and also there is a code library
but you should note that we do not support cells merging. Generally you can access the header item by using the GetItems
method of the MasterTable
view and use ColumnSpan.
sender, EventArgs e)
GridHeaderItem header = RadGrid1.MasterTableView.GetItems(GridItemType.Header)
].ColumnSpan = 2;
Nevertheless, as I already mentioned many of the built-in features might not work correctly when using this approach.
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