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Building a GridView in ASP.NET vs VB.NET

Chaffe
Chaffe asked
on
Medium Priority
681 Views
Last Modified: 2008-01-09
Greetings, Can someone tell me why when I build this Grid in ASP.NET it works perfect, and when I do the same thing in my code behind, I don't get any errors, but the grid doesn't show up on the page at all.

ASP.NET
          <asp:GridView ID="GridView1" runat="server" AllowPaging="True" PageSize="2" AllowSorting="True" AutoGenerateColumns="False" DataSourceID="ObjectDS" DataKeyNames="ContactID">            
            <Columns>
                <asp:BoundField DataField="ContactID" HeaderText="ContactID" SortExpression="ContactID" />
                <asp:BoundField DataField="FirstName" HeaderText="FirstName" SortExpression="FirstName" />
                <asp:CommandField HeaderText="Action" ShowEditButton="True" ShowHeader="True" />
            </Columns>
        </asp:GridView>
        <asp:ObjectDataSource ID="ObjectDS" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetBasicView" TypeName="DA.MasterTableAdapters.ContactsTableAdapter" UpdateMethod="UpdateBasicView">
            <UpdateParameters>
                <asp:Parameter Name="FirstName" Type="String" />
                <asp:Parameter Name="original_ContactID" Type="Int32" />
            </UpdateParameters>
        </asp:ObjectDataSource>
VB.NET
Protected Sub WPContactSearchGrid()
        Dim ContactID, FirstName As New BoundField
        Dim CmdField As New CommandField
        Dim DataKey(0) As String
        Grid = New GridView
        DataKey(0) = "ContactID"
        With Grid
            'Set Grid Specs
            .ID = "ContactsGridView"
            .AutoGenerateColumns = False
            .DataKeyNames = DataKey
            .AllowSorting = True
            .AllowPaging = True

            ContactID.ReadOnly = True
            ContactID.DataField = "ContactID"
            ContactID.Visible = False
            FirstName.HeaderText = "First Name"
            FirstName.SortExpression = "FirstName"
            FirstName.DataField = "FirstName"

            CmdField.ShowHeader = True
            CmdField.HeaderText = "Action"
            CmdField.ShowEditButton = True

            .Columns.Add(ContactID)
            .Columns.Add(FirstName)
            Grid.Columns.Add(CmdField)
            .DataSource = "ObjectDS"

        End With
       
        Dim ObjectDS As New ObjectDataSource
        Dim FN, OCID As New Parameter
        With ObjectDS
            .ID = "ObjectDS"
            .OldValuesParameterFormatString = "original_{0}"
            .TypeName = "DA.MasterTableAdapters.ContactsTableAdapter"
            .SelectMethod = "GetBasicView"
            .UpdateMethod = "UpdateBasicView"

            FN.Name = "FirstName"
            FN.Type = TypeCode.String
            OCID.Name = "original_ContactID"
            OCID.Type = TypeCode.Int32
            .UpdateParameters.Add(FN)
            .UpdateParameters.Add(OCID)
        End With
        Body.Controls.Add(Grid)
        Body.Controls.Add(ObjectDS)
    End Sub

Thanks.
Comment
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Top Expert 2006
Commented:
I think you need to change this line:
.DataSource = "ObjectDS"
to
.DataSourceID = "ObjectDS"

-- Jason

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Top Expert 2006

Commented:
And I'm not 100% sure, but you might need to add the following line after the .DataSourceID:
.DataBind()

Good luck!
-- Jason

Author

Commented:
Jason, That did it.  I didn't need to have the .DataBind().
I noticed that when you click the edit and the labels become text fields, these text fields contain a bunch of spaces after the text.  Is there a way to trim these spaces when I click on the edit button?  As always, your help is appreciated.
Top Expert 2006

Commented:
Glad that worked for you.  The extra spaces are probably coming from your actual data, so you might want to do the trimming as part of the stored procedure (or SELECT query).  Otherwise you'll have to change your BoundField columns to TemplateField columns, add the TextBox to the EditItemTemplate and put the Trim() logic in there, like:

<EditItemTemplate>
  <asp:TextBox runat="server" id="TextBox1" Text='<%# Bind("FirstName").ToString().Trim() %>' />
</EditItemTemplate>

Hope that helps.  Good luck!
-- Jason

Author

Commented:
I will give that a try.  Thanks again Jason.
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