asp.net - DataBinding: 'System.Data.DataRowView' does not contain a property with the name

Question

I am getting this weird error... the primary key in my database is 'DocumentID' so I know that is not the issue. I am trying to get the select,edit & delete gridview buttons to work but I need the datakeynames to be set correctly for them to be available to use. any ideas?

<asp:GridView ID="GridView1" runat="server" DataSourceID="sdsDocuments" EnableModelValidation="True"
        SelectedIndex="0" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" DataKeyNames="DocumentID, DocumentTitle, DocumentBody">
        <Columns>
            <asp:BoundField DataField="DocumentID" HeaderText="DocumentID" ReadOnly="True" SortExpression="ID" />
            <asp:BoundField DataField="DocumentTitle" HeaderText="DocumentTitle" SortExpression="Title" />
            <asp:BoundField DataField="DocumentBody" HeaderText="DocumentBody" SortExpression="Body" />
            <asp:CommandField ShowSelectButton="True" ShowDeleteButton="True" />
        </Columns>
    </asp:GridView>
    <asp:SqlDataSource ID="sdsDocuments" runat="server" ConnectionString="<%$ ConnectionStrings:blcDocumentationConnectionString %>"
        SelectCommand="SELECT [DocumentTitle], [DocumentBody] FROM [tblDocument]" />

Here is the stack trace...

    [HttpException (0x80004005): DataBinding: 'System.Data.DataRowView' does not contain a                 property with the name 'DocumentID'.] 
        System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +8672869
       System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +2178
       System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +57
       System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data) +14
       System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +114
       System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
       System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
       System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
       System.Web.UI.WebControls.GridView.DataBind() +4
       System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
       System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +72
       System.Web.UI.Control.EnsureChildControls() +87
       System.Web.UI.Control.PreRenderRecursiveInternal() +44
       System.Web.UI.Control.PreRenderRecursiveInternal() +171
       System.Web.UI.Control.PreRenderRecursiveInternal() +171

   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

Answer 1

Well, you haven't selected the documentid column and hence it's not present in either datatable or dataview which you are binding to grid OR referencing that column through datatable.

Change your query to

 SelectCommand="SELECT [DocumentID],[DocumentTitle], [DocumentBody] FROM [tblDocument]" />