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Need to rename Grid column names in a Dynamic Data website

Posted on 2011-03-21
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Last Modified: 2012-06-21
I have created a table which maps column names to the display names we want Dynamic Data to show. And I have succeeded in a few cases, like the Details page, getting the display name inserted and shown by Dynamic Data. But when it comes to the List.aspx page, the Label_PreRender() event only deals with relations, and does not fire when a column is being created.

Can anyone give me some advice? This page inherits from System.Web.UI.Page, and I need to find how to overwrite the column names.

Thanks,
newbieweb
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Question by:newbieweb
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LVL 11

Expert Comment

by:SAMIR BHOGAYTA
ID: 35181899
Hi,

Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowCreated
If e.Row.RowType = DataControlRowType.Header Then
e.Row.Cells(1).Text = “Show me the money”
End If
End Sub
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Author Comment

by:newbieweb
ID: 35182080
I do C#, but any time I have tried to change the DisplayName I have found them to be read only. I will try to decifer what you'd described...
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Author Comment

by:newbieweb
ID: 35182133
I found the GridView1_RowCreated() event and added the code in C#, but it does not stop at a breakpoint in that event. I need an event that will fire each and every time the Grid is populated. Do you know that one?

newbieweb
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LVL 7

Expert Comment

by:nbove
ID: 35182319
If you are looking for an event that will fire every time there is a postback, the Gridview PreRender should do the trick.
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Author Comment

by:newbieweb
ID: 35182796
I think I found the problem:

<asp:Label runat="server" Text='<%# Eval("DisplayName") %>' OnPreRender="Label_PreRender" />

What does this line tell you about what inside of Label_PreRender that I need to change with the correct display name?

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LVL 7

Expert Comment

by:nbove
ID: 35183705
Ahh, I see what you are saying.

Try adding this to code to your "Label_PreRender" event handler:

protected void Label_PreRender(object sender, EventArgs e) {
  Label lbl = (Label)sender;
  lbl.Text = "New Display Name";
}
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Author Comment

by:newbieweb
ID: 35184451
I had been doing so successfully, but only in pages inheriting from:
System.Web.DynamicData.EntityTemplateUserControl

When I inherit from  System.Web.UI.Page I can not do the above, since there is no Label_PreRender event.

I am stumped!

newbieweb

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LVL 7

Expert Comment

by:nbove
ID: 35184714
Hmm, perhaps I am not understanding the nature of the problem.  If there is not an event handler, then simply add the event handler.
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Author Comment

by:newbieweb
ID: 35189383
How do I associate the Label_PreRender event with the label? I see no label in the entire page.


<asp:Content ID="headContent" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:DynamicDataManager ID="DynamicDataManager1" runat="server" AutoLoadForeignKeys="true">
        <DataControls>
            <asp:DataControlReference ControlID="FormView1" />
        </DataControls>
    </asp:DynamicDataManager>

    <h2 class="DDSubHeader">Entry from table <%= /*table.DisplayName*/ Title %></h2>

    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:ValidationSummary ID="ValidationSummary1" runat="server" EnableClientScript="true"
                HeaderText="List of validation errors" CssClass="DDValidator" />
            <asp:DynamicValidator runat="server" ID="DetailsViewValidator" ControlToValidate="FormView1" Display="None" CssClass="DDValidator" />

            <asp:FormView runat="server" ID="FormView1" DataSourceID="DetailsDataSource" OnItemDeleted="FormView1_ItemDeleted" RenderOuterTable="false">
                <ItemTemplate>
                    <table id="detailsTable" class="DDDetailsTable" cellpadding="6">
                        <asp:DynamicEntity runat="server" />
                        <tr class="td">
                            <td colspan="2">
                                <asp:DynamicHyperLink runat="server" Action="Edit" Text="Edit" />
                                <asp:LinkButton runat="server" CommandName="Delete" Text="Delete"
                                    OnClientClick='return confirm("Are you sure you want to delete this item?");' />
                            </td>
                        </tr>
                    </table>
                </ItemTemplate>
                <EmptyDataTemplate>
                    <div class="DDNoItem">No such item.</div>
                </EmptyDataTemplate>
            </asp:FormView>

            <asp:EntityDataSource ID="DetailsDataSource" runat="server" EnableDelete="true" />

            <asp:QueryExtender TargetControlID="DetailsDataSource" ID="DetailsQueryExtender" runat="server">
                <asp:DynamicRouteExpression />
            </asp:QueryExtender>

            <br />

            <div class="DDBottomHyperLink">
                <asp:DynamicHyperLink ID="ListHyperLink" runat="server" Action="List">Show all items</asp:DynamicHyperLink>
            </div>
        </ContentTemplate>
    </asp:UpdatePanel>
</asp:Content>

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LVL 7

Accepted Solution

by:
nbove earned 500 total points
ID: 35190803
It looks as though you are creating all of your controls using custom user controls.  You will have to find the spot in the code that is creating the label and add an event handler to the label's prerender event when it is created.
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Author Closing Comment

by:newbieweb
ID: 35215302
Thanks!
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