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WebGrid client-side dynamic grouping problem

5 replies. Last post: March 14, 2010 11:48 PM by Handy Surya
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Mladen MarasMember
Posted: March 11, 2010 9:59 AM

I have a problem when I try to dynamically change grouping in WebGrid using javascript function on the client side. I use dropdown list to specify in which ways to group data in grid.

<asp:DropDownList ID="ddlGrupiranje" runat="server" SkinID="Medium" onchange="ChangeGroup(this.id);">
	<asp:ListItem Text="Po oznaci" Value="1" Selected="True"></asp:ListItem>
	<asp:ListItem Text="Po fazi" Value="2" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po ics-u" Value="3" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po oznaci izvornika" Value="4" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po tajniku" Value="5" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po smjernicama" Value="6" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po naslovu" Value="7" Selected="False"></asp:ListItem>
	<asp:ListItem Text="PovuÄŤeni projekti" Value="8" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po Glasilu - rasprava" Value="9" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po Glasilu - objava" Value="10" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po Glasilu - ispravak" Value="11" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po Glasilu - potvrđivanje" Value="12" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Po Glasilu - povlaÄŤenje" Value="13" Selected="False"></asp:ListItem>
	<asp:ListItem Text="Arhiva" Value="14" Selected="False"></asp:ListItem>
</asp:DropDownList>

Javascript function is defined like this:

function ChangeGroup(ddlId) {
	var ddl = document.getElementById(ddlId);
	var selectedValue = ddl.options[ddl.selectedIndex].value;
	
	var grid = ISGetObject("WebGrid1");
	
	if (grid == null) {
		return;
	}
	
	var rootTable = grid.RootTable;
	while (rootTable.GroupedColumns[0] != null) {
		rootTable.GroupedColumns.RemoveAt(0);
	}
	
	switch (selectedValue) {
		case "1":
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			break;
		case "2":
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Faza";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "3":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "TehOdbor";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var ics1 = new WebGridGroup();
			ics1.ColumnMember = "ICSGrupa1";
			ics1.GroupInterval = "Text";
			ics1.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(ics1);
			var ics2 = new WebGridGroup();
			ics2.ColumnMember = "ICSGrupa2";
			ics2.GroupInterval = "Text";
			ics2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(ics2);
			var ics3 = new WebGridGroup();
			ics3.ColumnMember = "ICS";
			ics3.GroupInterval = "Text";
			ics3.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(ics3);
			break;
		case "4":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "TehOdbor";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Faza";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "5":
			var tajnik = new WebGridGroup();
			tajnik.ColumnMember = "Tajnik";
			tajnik.GroupInterval = "Text";
			tajnik.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(tajnik);
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "TehOdbor";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "OznakaIzvornika";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "6":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "VezaEUDirektive";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			break;
		case "7":
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			break;
		case "8":
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			break;
		case "9":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "Rasprava";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Tajnik";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "10":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "Objava";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Tajnik";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			var TOGroup = new WebGridGroup();
			TOGroup.ColumnMember = "TehOdbor";
			TOGroup.GroupInterval = "Text";
			TOGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(TOGroup);
			break;
		case "11":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "Ispravak";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Tajnik";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "12":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "Potvrdjivanje";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Tajnik";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "13":
			var groupby = new WebGridGroup();
			groupby.ColumnMember = "Povlacenje";
			groupby.GroupInterval = "Text";
			groupby.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby);
			var groupby2 = new WebGridGroup();
			groupby2.ColumnMember = "Tajnik";
			groupby2.GroupInterval = "Text";
			groupby2.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(groupby2);
			break;
		case "14":
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			break;
		default:
			var newGroup = new WebGridGroup();
			newGroup.ColumnMember = "TehOdbor";
			newGroup.GroupInterval = "Text";
			newGroup.SortOrder = "Disabled";
			grid.RootTable.GroupedColumns.Add(newGroup);
			break;
	}
	
	grid.RootTable.UpdateUI();
	grid.Refresh();
	}

Grid itself has over 30 columns. When I change grouping, columns that are used for grouping are removed from RootTable.Columns collection. When I change back grouping to previous selection, javascript error of undefined is thrown, because columns were removed when they were first grouped by. 

When GroupedColumns are cleared, regarding columns are not returned to RootTable.Columns collection.

How can this be solved?

CheckedRows cellValue
Truncate grid from clientside
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