I'm running my code all alright. I've created the table that you see on the picture, but I can't see the line new Straight Line HeaderText.
I'm using ASP.net C# with Telerik.
** But What am I missing to display that line?**
Please help!
**GridView Code **
<div id="divMainGrid" runat="server" style="height: 700px">
<p>
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" GridLines="None" ToolTip="Click on a row to select a setting." AllowPaging="true"
CssClass="AddBorders" ShowFooter="false" Width="100%" AllowFilteringByColumn="true" AllowSorting="true"
Visible="true"
OnDetailTableDataBind="RadGrid1_DetailTableBind"
OnNeedDataSource="radGrid_DataSource"
EnableHierarchyExpandAll="false">
<PagerStyle Mode="NextPrevAndNumeric" AlwaysVisible="true" />
<ClientSettings EnablePostBackOnRowClick="false" EnableRowHoverStyle="true" AllowColumnsReorder="true">
<Resizing AllowColumnResize="false" />
<Selecting AllowRowSelect="false" />
<Scrolling AllowScroll="true" UseStaticHeaders="true" SaveScrollPosition="true" EnableVirtualScrollPaging="false" ScrollHeight="490px" FrozenColumnsCount="3" />
</ClientSettings>
<GroupingSettings CaseSensitive="false" />
<MasterTableView Width="100%" DataKeyNames="AssetClass_ID, AssetCategory_ID" TableLayout="Fixed">
<ColumnGroups>
<telerik:GridColumnGroup Name="DepreciationAmortisationMethod" HeaderText="Depreciation/Amortisation Method" HeaderStyle-HorizontalAlign="Center">
</telerik:GridColumnGroup>
<telerik:GridColumnGroup Name="MeasurementModel" HeaderText="Measurement Model" HeaderStyle-HorizontalAlign="Center">
</telerik:GridColumnGroup>
<telerik:GridColumnGroup Name="RevaluationModel" HeaderText="Revaluation Model" HeaderStyle-HorizontalAlign="Center">
</telerik:GridColumnGroup>
</ColumnGroups>
<DetailTables>
<telerik:GridTableView DataKeyNames="AssetClass_ID, AssetCategory_ID" Name="CategoryDetails" EnableHierarchyExpandAll="false" HierarchyLoadMode="ServerOnDemand" AutoGenerateColumns="false">
<Columns>
<telerik:GridBoundColumn DataField="AssetCategory_ID" HeaderText="Asset Category ID" UniqueName="AssetCategory_ID" HeaderStyle-HorizontalAlign="Left" HeaderStyle-Width="5px" Visible="false" />
<telerik:GridBoundColumn DataField="CategoryDescription" HeaderText="Asset Category Description" UniqueName="CategoryDescription" HeaderStyle-HorizontalAlign="Left" HeaderStyle-Width="104px" />
<%-- '>
<telerik:GridTemplateColumn ColumnEditorID="colEditMonths" DataField="UsefulLifeMonth" HeaderText="Months" UniqueName="Months" HeaderStyle-Width="85px" ColumnGroupName="UsefulLife">
<ItemTemplate>
<asp:TextBox ID="txtMonths" runat="server" Width="85px" ReadOnly="false" ViewStateMode="Enabled" Text='<%# Eval("UsefulLifeMonth").ToString()%>'></asp:TextBox>
</ItemTemplate>
</telerik:GridTemplateColumn>--%>
</Columns>
</telerik:GridTableView>
</DetailTables>
<Columns>
<telerik:GridTemplateColumn ColumnEditorID="colEditChkbox" HeaderText="Select" UniqueName="SelectAsset" AllowFiltering="false" HeaderStyle-Width="45px" >
<ItemTemplate>
<asp:CheckBox ID="chkSelectAsset" runat="server" Text="Select" EnableViewState="true" />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="AssetClass_ID" HeaderText="Asset Class ID" UniqueName="AssetClass_ID" HeaderStyle-HorizontalAlign="Left" HeaderStyle-Width="5px" Visible="false" />
<telerik:GridBoundColumn DataField="AssetClassDescription" HeaderText="Asset Class Description" UniqueName="AssetCategory_ID" HeaderStyle-HorizontalAlign="Left" HeaderStyle-Width="175px" Visible="true" ColumnGroupName="DepreciationAmortisationMethod" />
<telerik:GridTemplateColumn ColumnEditorID="colEdit_StraightLineID" DataField="StraightLine" HeaderText="Straight Line" UniqueName="StraightLineID" AllowFiltering="false" HeaderStyle-Width="140px" ItemStyle-VerticalAlign="Top" ColumnGroupName="DepreciationAmortisationMethod">
<ItemTemplate>
<asp:RadioButton ID="rdbStraightLine" runat="server" CausesValidation="true" GroupName="DepreciationAmortisationMethod" Checked='<%# Convert.ToBoolean(Eval("StraightLine")) == false ? false : Convert.ToBoolean(Eval("StraightLine"))%>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_DiminishingBalanceInitialYear" DataField="DiminishingBalanceInitialYear" HeaderText="Diminishing Balance Initial Year" UniqueName="DiminishingBalanceInitialYear" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="DepreciationAmortisationMethod">
<ItemTemplate>
<asp:RadioButton ID="rdbDiminishingBalanceInitialYear" runat="server" CausesValidation="true" GroupName="DepreciationAmortisationMethod" Checked='<%# Convert.ToBoolean(Eval("DiminishingBalanceInitialYear")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_DiminishingBalanceSubsequentYear" DataField="DiminishingBalanceSubsequentYear" HeaderText="Diminishing Balance SubsequentYear" UniqueName="DiminishingBalanceSubsequentYear" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="DepreciationAmortisationMethod">
<ItemTemplate>
<asp:RadioButton ID="rdbDiminishingBalanceSubsequentYear" runat="server" CausesValidation="true" GroupName="DepreciationAmortisationMethod" Checked='<%# Convert.ToBoolean(Eval("DiminishingBalanceSubsequentYear")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_UnitsOfProduction" DataField="UnitsOfProduction" HeaderText="Units Of Production" UniqueName="UnitsOfProduction" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="DepreciationAmortisationMethod">
<ItemTemplate>
<asp:RadioButton ID="rdbUnitsOfProduction" runat="server" CausesValidation="true" GroupName="DepreciationAmortisationMethod" Checked='<%# Convert.ToBoolean(Eval("UnitsOfProduction")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_Cost" DataField="Cost" HeaderText="Cost" UniqueName="Cost" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="MeasurementModel">
<ItemTemplate>
<asp:RadioButton ID="rdbCost" runat="server" CausesValidation="true" GroupName="MeasurementModel" Checked='<%# Convert.ToBoolean(Eval("Cost")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_RevaluedAmount" DataField="RevaluedAmount" HeaderText="RevaluedAmount" UniqueName="RevaluedAmount" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="MeasurementModel">
<ItemTemplate>
<asp:RadioButton ID="rdbRevaluedAmount" runat="server" CausesValidation="true" GroupName="MeasurementModel" Checked='<%# Convert.ToBoolean(Eval("RevaluedAmount")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_FairValue" DataField="FairValue" HeaderText="Fair Value" UniqueName="FairValue" AllowFiltering="false" HeaderStyle-Width="140px" ColumnGroupName="MeasurementModel">
<ItemTemplate>
<asp:RadioButton ID="rdbFairValue" runat="server" CausesValidation="true" GroupName="MeasurementModel" Checked='<%# Convert.ToBoolean(Eval("FairValue")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_DepreciationProportionately" DataField="DepreciationProportionately" HeaderText="Restatement of Accumulated Depreciation Proportionately" UniqueName="DepreciationProportionately" AllowFiltering="false" HeaderStyle-Width="180px" ColumnGroupName="RevaluationModel">
<ItemTemplate>
<asp:RadioButton ID="rdbDepreciationProportionately" runat="server" CausesValidation="true" GroupName="RevaluationModel" Checked='<%# Convert.ToBoolean(Eval("DepreciationProportionately")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn ColumnEditorID="colEdit_AccumulatedDepreciation" DataField="AccumulatedDepreciation" HeaderText="Accumulated Depreciation Eliminated against Gross Carrying Amount of the Asset" UniqueName="AccumulatedDepreciation" AllowFiltering="false" HeaderStyle-Width="180px" ColumnGroupName="RevaluationModel">
<ItemTemplate>
<asp:RadioButton ID="rdbAccumulatedDepreciation" runat="server" CausesValidation="true" GroupName="RevaluationModel" Checked='<%# Convert.ToBoolean(Eval("AccumulatedDepreciation")) %>' />
</ItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
<FilterMenu EnableImageSprites="False" />
</telerik:RadGrid>
</p>
</div>
I know there used to be some issues with static headers and frozen columns when used together, but I think they are resolved. Try the latest version (at the time of writing: 2015.1.225 in numbers, Q1 2016 SP1 in "words") and perhaps things will be fine. If not, open a ticket with Telerik.
