I Have Implemented WebHirachicalDataGrid and i need to get the all the Checked checkBox on Server side. Currently when i am Clicking on checkbox and then Press the Save Button , Form Post Back but Respective Function doesn't Trigger. and Getting Error . My Code is Below

<ig:WebHierarchicalDataGrid ID="WebHierarchicalDataGrid1" runat="server" AutoGenerateBands="False"
AutoGenerateColumns="False" DataKeyFields="id" DataMember="Module" EnableViewState="true"
ViewStateMode="Enabled" StyleSetName="Office2007Blue"
InitialExpandDepth="3" InitialDataBindDepth="3"
Height="350px" Width="900px" >
<%--<ClientEvents Initialize="InitializHandler" Click="ClickHandler"/>--%>
<%-- <AutoPostBackFlags RowSelectionChanged="false" />--%>
<%--<AutoPostBackFlags CellSelectionChanged="Of" />--%>
<Columns>
<ig:BoundDataField DataFieldName="id" Hidden="true" DataType="System.Int32" Key="id" Width="100px">
<Header Text="Module ID" />
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="Item" DataType="System.String" Key="Item">
<Header Text="Module Description" />
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="Data" Hidden="true" DataType="System.String" Key="Data">
<Header Text="Operations" />
</ig:BoundDataField>
<%--<ig:BoundCheckBoxField DataFieldName="View" DataType="System.Boolean" Key="View">
<Header Text="View" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="Update" DataType="System.Boolean" Key="Update">
<Header Text="Update" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="Delete" DataType="System.Boolean" Key="Delete">
<Header Text="Delete" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="Save" DataType="System.Boolean" Key="Save">
<Header Text="Save" />
</ig:BoundCheckBoxField>--%>
</Columns>

<Bands>
<%--<ig:Band AutoGenerateColumns="False" DataKeyFields="Item" DataMember="TRN_CODE" Key="ChildBand_0">--%>
<ig:Band AutoGenerateColumns="False" DataKeyFields="ChildId" DataMember="TRN_CODE" Key="ChildBand_0">
<Columns>

<%-- <ig:BoundDataField DataFieldName="ChildTableId" Hidden="false" DataType="System.Int32" Key="ChildTableId">
<Header Text="ChildTableId" />
</ig:BoundDataField>--%>
<ig:BoundDataField DataFieldName="ChildId" Hidden="false" DataType="System.Int32" Key="DataCh">
<Header Text="Child Id" />
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="Item" DataType="System.String" Key="ItemCh">
<Header Text="Menu Name" />
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="ParentId" Hidden="true" DataType="System.Int32" Key="idCh">
<Header Text="Parent ID" />
</ig:BoundDataField>
<ig:BoundDataField DataFieldName="Operations" Hidden="false" DataType="System.String" Key="Operations">
<Header Text="Operations" />
</ig:BoundDataField>
<ig:BoundCheckBoxField DataFieldName="Trn_Operations" DataType="System.Boolean" Key="Trn_Operations" >
<%--<Header Text="Operations" />--%>
</ig:BoundCheckBoxField>
<%--<ig:BoundCheckBoxField DataFieldName="ChView" DataType="System.Boolean" Key="ChView">
<Header Text="View" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="ChUpdate" DataType="System.Boolean" Key="ChUpdate">
<Header Text="Update" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="ChDelete" DataType="System.Boolean" Key="ChDelete">
<Header Text="Delete" />
</ig:BoundCheckBoxField>
<ig:BoundCheckBoxField DataFieldName="ChSave" DataType="System.Boolean" Key="ChSave">
<Header Text="Save" />
</ig:BoundCheckBoxField>--%>

</Columns>

<Behaviors>
<ig:EditingCore BatchUpdating="True">
<Behaviors>
<ig:RowAdding/>
<ig:RowDeleting/>
<ig:CellEditing/>
</Behaviors>
</ig:EditingCore>
<%--<ig:EditingCore AutoCRUD="false">
<Behaviors>
<ig:CellEditing>
<ColumnSettings>
<ig:EditingColumnSetting ColumnKey="ItemCh" ReadOnly="true" />
</ColumnSettings>

</ig:CellEditing>
</Behaviors>
</ig:EditingCore>--%>
</Behaviors>
</ig:Band>
</Bands>

<Behaviors>

<ig:Selection CellClickAction="Row" CellSelectType="None" RowSelectType="Single">
<AutoPostBackFlags CellSelectionChanged="false" RowSelectionChanged="false" ColumnSelectionChanged="false" />
<%--<AutoPostBackFlags RowSelectionChanged="false" />--%>

</ig:Selection>
<ig:Activation>
</ig:Activation>
<ig:EditingCore BatchUpdating="True">
</ig:EditingCore>
<%--<ig:EditingCore>
<Behaviors>

<ig:CellEditing>
<ColumnSettings>

<ig:EditingColumnSetting ColumnKey="Item" ReadOnly="true" />
</ColumnSettings>

</ig:CellEditing>
</Behaviors>
</ig:EditingCore>--%>
</Behaviors>
</ig:WebHierarchicalDataGrid>

private DataTable CreateGridDataSourceForSubModules(string tableName, bool duplicate)
{

DataTable SubModules = Trn_Oprations.GetAllTrnsList();
// Create a new DataTable.
System.Data.DataTable table = new DataTable(tableName);
// Declare variables for DataColumn and DataRow objects.
DataColumn column;
DataRow row;

// Create new DataColumn, set DataType,
// Create First column.
//column = new DataColumn();
//column.DataType = System.Type.GetType("System.Int32");
////column.ColumnName = "Data";
//column.ColumnName = "ChildTableId";
//column.AutoIncrement = false;
//column.Caption = "ChildTableId";
//column.ReadOnly = false;
//column.Unique = false;
//// Add the column to the table.
//table.Columns.Add(column);

column = new DataColumn();
column.DataType = System.Type.GetType("System.Int32");
//column.ColumnName = "Data";
column.ColumnName = "ChildId";
column.AutoIncrement = false;
column.Caption = "ChildId";
column.ReadOnly = false;
column.Unique = false;
// Add the column to the table.
table.Columns.Add(column);

// Create second column.
column = new DataColumn();
column.DataType = System.Type.GetType("System.String");
column.ColumnName = "Item";
column.AutoIncrement = false;
column.Caption = "Item";
column.ReadOnly = false;
column.Unique = false;
// Add the column to the table.
table.Columns.Add(column);


// ColumnName and add to DataTable.
column = new DataColumn();
column.DataType = System.Type.GetType("System.Int32");
column.ColumnName = "ParentId";
column.ReadOnly = true;
// Add the Column to the DataColumnCollection.
table.Columns.Add(column);

column = new DataColumn();
column.DataType = System.Type.GetType("System.String");
column.ColumnName = "Operations";
//column.DefaultValue = false;
table.Columns.Add(column);

column = new DataColumn();
column.DataType = System.Type.GetType("System.Boolean");
column.ColumnName = "Trn_Operations";
column.DefaultValue = false;
table.Columns.Add(column);

//TemplateDataField templateCol = new TemplateDataField();
//templateCol.ItemTemplate = new CustomItemTemplate();
//WebHierarchicalDataGrid1.Columns.Add(templateCol);
//column = new DataColumn();
//column.DataType = System.Type.GetType("System.Boolean");
//column.ColumnName = "ChView";
//column.AutoIncrement = false;
//column.Caption = "View";
////column.ReadOnly = false;
//column.Unique = false;
//column.DefaultValue = false;
//// Add the column to the table.
//table.Columns.Add(column);

//column = new DataColumn();
//column.DataType = System.Type.GetType("System.Boolean");
//column.ColumnName = "ChUpdate";
//column.AutoIncrement = false;
////column.Caption = "Update";
//column.ReadOnly = false;
//column.Unique = false;
//column.DefaultValue = false;
//// Add the column to the table.
//table.Columns.Add(column);

//column = new DataColumn();
//column.DataType = System.Type.GetType("System.Boolean");
//column.ColumnName = "ChDelete";
//column.AutoIncrement = false;
//column.Caption = "Delete";
//// column.ReadOnly = false;
//column.Unique = false;
//column.DefaultValue = false;
//// Add the column to the table.
//table.Columns.Add(column);

//column = new DataColumn();
//column.DataType = System.Type.GetType("System.Boolean");
//column.ColumnName = "ChSave";
//column.AutoIncrement = false;
//column.Caption = "Save";
//column.ReadOnly = false;
//column.Unique = false;
//column.DefaultValue = false;
//// Add the column to the table.
//table.Columns.Add(column);

//for (int j = 0; j < SubModules.Rows.Count; j++)
//{
// string Trn_id = SubModules.Rows[j]["Trn_Id"].ToString();
// DataTable GetTrnOperationsByTrnId = Trn_Oprations.GetOperationsByTrn(Trn_id);

//for (int u = 0; u < GetTrnOperationsByTrnId.Rows.Count; u++)
//{
// BoundCheckBoxField field = new BoundCheckBoxField(true);
// column = new DataColumn();
// field.Key = "Discontinued" + u + 1;
// field.Header.Text = "Discontinued" + u;
// field.DataFieldName = "Discontinued" + u;
// this.WebHierarchicalDataGrid1.
// this.WebHierarchicalDataGrid1.Columns.Add(field);
// // column.Columns.Add(field);
//}
// }

// Make the ID column the primary key column.
if (!duplicate)
{
DataColumn[] PrimaryKeyColumns = new DataColumn[1];
PrimaryKeyColumns[0] = table.Columns["id"];
table.PrimaryKey = PrimaryKeyColumns;
}
else
{

//DataColumn[] PrimaryKeyColumns = new DataColumn[1];
//PrimaryKeyColumns[0] = table.Columns["ChildTableId"];
//table.PrimaryKey = PrimaryKeyColumns;
}

for (int k = 0; k < SubModules.Rows.Count; k++)
{
string TrnId = SubModules.Rows[k]["Trn_Id"].ToString();
DataTable TrnOperations=Trn_Oprations.GetOperationsByTrn(TrnId);

for (int j = 0; j < TrnOperations.Rows.Count; j++) // it Should Create Each by the count of Trn Operations
{
row = table.NewRow();
// CheckBox cb = new CheckBox();
string a = SubModules.Rows[k]["MODULE_CODE"].ToString();
// row["ChildTableId"] = k;
row["ParentId"] = Convert.ToInt32(a);
row["Item"] = SubModules.Rows[k]["Menu_Label"].ToString();
row["ChildId"] = Convert.ToInt32(SubModules.Rows[k]["Trn_Id"].ToString());
// BoundCheckBoxField ckField = new BoundCheckBoxField();
// ckField.Key = TrnOperations.Rows[j]["Opr_Description"].ToString();
row["Operations"] = TrnOperations.Rows[j]["Opr_Description"].ToString();
//((BoundCheckBoxField)this.WebHierarchicalDataGrid1.Columns["Operations"]).ValueConverter = ;
string OperationName= TrnOperations.Rows[j]["Opr_Description"].ToString();
table.Rows.Add(row);

}
}

return table;

}