[Solved] RadGrid Inheritance (Tag issue)

[Satyananda Beura]

Hello ,

I'm  currently testing Telerik RadGrid control by creating a wrapper class.I’m facing an issue for  auto genration of columns in RadGridView with coustom prefix tag .

Here are the steps ,what I have done for testing the control.

1.Have created wrapper of all grid related classes such as RadGrid,RadGridDesigner,20 classes under <columns>  and two classes of DetailTables with Prefix "HC" .
2. Have used the <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> in page directive of aspx page.
3.Drag the HCGridView control from the ToolBox and drop inside the aspx page.
4.Below codes are auto generating  when I assign the XmlDatasource to HCGridView .

<HC:HCGridView ID="HCGridView1" runat="server"

                        DataSourceID="XmlDataSourceCulture" GridLines="None" HelpId=""

                        SecurityApplied="False">

                        <MasterTableView AutoGenerateColumns="False"

                              DataSourceID="XmlDataSourceCulture" HelpId="">

                              <RowIndicatorColumn>

                                    <HeaderStyle Width="20px" />

                              </RowIndicatorColumn>

                              <ExpandCollapseColumn>

                                    <HeaderStyle Width="20px" />

                              </ExpandCollapseColumn>

                              <Columns>

                                    <telerik:GridBoundColumn DataField="id" HeaderText="id" SortExpression="id"

                                     UniqueName="id">

                                </telerik:GridBoundColumn>

                                <telerik:GridBoundColumn DataField="name" HeaderText="name"

                                     SortExpression="name" UniqueName="name">

                                </telerik:GridBoundColumn>

                                <telerik:GridBoundColumn DataField="value" HeaderText="value"

                                     SortExpression="value" UniqueName="value">

                                </telerik:GridBoundColumn>

                              </Columns>

                              <EditFormSettings>

                                    <EditColumn UniqueName="EditCommandColumn1">

                                    </EditColumn>

                              </EditFormSettings>

                        </MasterTableView>

                        <ClientSettings>

                              <Selecting AllowRowSelect="True" />

                        </ClientSettings>

                  </HC:HCGridView>

Here issue is that ,it  is generating the columns under <Columns></Columns> block with the tag “ telerik” instead of “HC” .

 Below error is coming in case of remove   <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> from page directive of aspx page.

 

HCGridView - HCGridView1System.Web.HttpParseException: Telerik.Web.UI.GridColumnCollection must have items of type 'Telerik.Web.UI.GridColumn'. 'telerik.web.ui.gridboundcolumn' is of type 'System.Web.UI.HtmlControls.HtmlGenericControl'. ---> System.Web.HttpParseException: Telerik.Web.UI.GridColumnCollection must have items of type 'Telerik.Web.UI.GridColumn'. 'telerik.web.ui.gridboundcolumn' is of type 'System.Web.UI.HtmlControls.HtmlGenericControl'. ---> System.Web.HttpException: Telerik.Web.UI.GridColumnCollection must have items of type 'Telerik.Web.UI.GridColumn'. 'telerik.web.ui.gridboundcolumn' is of type 'System.Web.UI.HtmlControls.HtmlGenericControl'. at System.Web.UI.CollectionBuilder.GetChildControlType(String tagName, IDictionary attribs) at System.Web.UI.ControlBuilder.CreateChildBuilder(String filter, String tagName, IDictionary attribs, TemplateParser parser, ControlBuilder parentBuilder, String id, Int32 line, VirtualPath virtualPath, Type& childType, Boolean defaultProperty) at System.Web.UI.TemplateParser.ProcessBeginTag(Match match, String inputText) at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) --- End of inner exception stack trace --- at System.Web.UI.TemplateParser.ProcessException(Exception ex) at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding) at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) --- End of inner exception stack trace --- at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding) at System.Web.UI.TemplateParser.ParseInternal() at System.Web.UI.TemplateParser.Parse() at System.Web.UI.DesignTimeTemplateParser.ParseControlsInternal(DesignTimeParseData data, Boolean returnFirst) at System.Web.UI.DesignTimeTemplateParser.ParseControl(DesignTimeParseData data) at System.Web.UI.Design.ControlSerializer.DeserializeControlInternal(String text, IDesignerHost host, Boolean applyTheme) at System.Web.UI.Design.ControlParser.ParseControl(IDesignerHost designerHost, String controlText, Boolean applyTheme) at System.Web.UI.Design.ControlDesigner.CreateClonedControl(IDesignerHost parseTimeDesignerHost, Boolean applyTheme) at System.Web.UI.Design.ControlDesigner.CreateViewControl() at System.Web.UI.Design.ControlDesigner.CreateViewControlInternal() at System.Web.UI.Design.ControlDesigner.get_ViewControl() at Telerik.Web.Design.RadGridDesigner.get_Grid() at Telerik.Web.Design.RadGridDesigner.GetDesignTimeHtml(DesignerRegionCollection regions) at System.Web.UI.Design.ControlDesigner.GetViewRendering(ControlDesigner designer)

How to  Auto Generate Columns of all tags with “HC”

Thanks

-Satya

[Tsvetoslav]

Hello Satyananda,

I am afraid it is not possible to create wrapper classes for the grid and its components and have a working control without rewriting its whole internal code.

Regards,
Tsvetoslav
the Telerik team

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