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POGridView DataItem not persisting between mode changes
 

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  1. POGridView DataItem not persisting between mode changes
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    <p>im having some wierd issue with my GridView. Basically, im trying to run a delete command on a table. The gridview has 3 fields bound to it, ItemId, ItemSummary, and ItemDate.</p> <p>Now as i recall, during a mode change (say, between Select and Edit) these fields are automatically passed using the syntax @+FieldName (ie. ItemId is passed as @ItemId).</p> <p>So keeping this in mind i tried the delete statement, but it gave an error saying the parameter was not passed. So i tried the other route, to extract the ItemId programmatically and insert it as a parameter at runtime.</p> <p>I tried reading from the DataItem bound to to the control, but it kept returning null.</p> <p>After some more debugging, i found that when the data was initially bound to the control, it correctly created a DataItem, but as soon as the mode was changed the DataItem is now null.</p> <p>I have been trying to fix this for ages and it just wont work. Here is my code:</p> <pre><code>&lt;asp:DetailsView FieldHeaderStyle-CssClass="bold" CssClass="marginLeftRightBottom10px center" AutoGenerateDeleteButton="true" AutoGenerateEditButton="true" GridLines="Both" ID="dvIndividualUpdate" AutoGenerateInsertButton="true" runat="server" AutoGenerateRows="False" DataSourceID="sqldsSingleUpdate" OnDataBound="dvIndividualUpdate_DataBound"&gt; &lt;Fields&gt; &lt;asp:TemplateField&gt; &lt;HeaderTemplate&gt; Update Id: &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Label Text='&lt;%# Eval("updateId") %&gt;' ID="lblUpdateId" runat="server"&gt;&lt;/asp:Label&gt; &lt;/ItemTemplate&gt; &lt;InsertItemTemplate&gt; &lt;asp:Label Text='Auto Generated' ID="lblUpdateIdInsert" runat="server"&gt;&lt;/asp:Label&gt; &lt;/InsertItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:Label Text='Auto Generated' ID="lblUpdateIdEdit" runat="server"&gt;&lt;/asp:Label&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField&gt; &lt;HeaderTemplate&gt; Update Summary: &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Label Text='&lt;%# Eval("updateSummary") %&gt;' ID="lblUpdateSummary" runat="server"&gt;&lt;/asp:Label&gt; &lt;/ItemTemplate&gt; &lt;InsertItemTemplate&gt; &lt;asp:TextBox CssClass="tbUpdateSummaryInsert" TextMode="MultiLine" Text='&lt;%# Bind("updateSummary") %&gt;' ID="tbUpdateSummary" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;/InsertItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:TextBox CssClass="tbUpdateSummaryEdit" TextMode="MultiLine" Text='&lt;%# Bind("updateSummary") %&gt;' ID="tbUpdateSummary" runat="server"&gt;&lt;/asp:TextBox&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:TemplateField&gt; &lt;HeaderTemplate&gt; Update Date: &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Label Text='&lt;%# Eval("dateOfUpdate") %&gt;' ID="lblDateOfUpdateInsert" runat="server"&gt;&lt;/asp:Label&gt; &lt;/ItemTemplate&gt; &lt;InsertItemTemplate&gt; &lt;asp:Label Text='' ID="lblEditDateOfUpdate" runat="server"&gt;&lt;/asp:Label&gt; &lt;/InsertItemTemplate&gt; &lt;EditItemTemplate&gt; &lt;asp:Label Text='&lt;%# Eval("dateOfUpdate") %&gt;' ID="lblDateOfUpdateEdit" runat="server"&gt;&lt;/asp:Label&gt; &lt;/EditItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;/Fields&gt; &lt;/asp:DetailsView&gt; &lt;asp:Label ID="lblUpdateErrors" runat="server" Text="" CssClass="block colorRed marginBottom10px center"&gt;&lt;/asp:Label&gt; &lt;asp:SqlDataSource DataSourceMode="DataSet" ID="sqldsSingleUpdate" runat="server" ConnectionString="&lt;%$ ConnectionStrings:myDbConnection%&gt;" SelectCommandType="StoredProcedure" SelectCommand="dbo.getUpdate" InsertCommand="dbo.createUpdate" InsertCommandType="StoredProcedure" OnInserted="sqldsSingleUpdate_Inserted" DeleteCommand="dbo.deleteUpdate" DeleteCommandType="StoredProcedure" OnDeleted="sqldsSingleUpdate_Deleted" OnDeleting="sqldsSingleUpdate_Deleting"&gt; &lt;DeleteParameters&gt; &lt;asp:Parameter Name="updateID" /&gt; &lt;/DeleteParameters&gt; &lt;SelectParameters&gt; &lt;asp:ControlParameter Name="updateId" ControlID="gvUpdates" PropertyName="SelectedDataKey.Value" /&gt; &lt;/SelectParameters&gt; &lt;InsertParameters&gt; &lt;asp:ControlParameter DbType="Date" ControlID="dvIndividualUpdate$lblEditDateOfUpdate" Name="dateOfUpdate" PropertyName="Text" /&gt; &lt;/InsertParameters&gt; &lt;/asp:SqlDataSource&gt; </code></pre> <p>And my related codebehind:</p> <pre><code>protected void dvIndividualUpdate_DataBound(object sender, EventArgs e) { if (dvIndividualUpdate.CurrentMode == DetailsViewMode.Insert) { Label lbl = dvIndividualUpdate.FindControl("lblEditDateOfUpdate") as Label; lbl.Text = DateTime.Today.ToString("dd-MM-yyyy"); } } protected void sqldsSingleUpdate_Inserted(object sender, SqlDataSourceStatusEventArgs e) { if (e.Exception != null) { Exception ex = e.Exception; lblUpdateErrors.Text = "There was a problem creating the update."; ErrorSignal.FromCurrentContext().Raise(ex); e.ExceptionHandled = true; return; } else { lblUpdateErrors.Text = "Update created successfully."; gvUpdates.DataBind(); } } protected void sqldsSingleUpdate_Deleted(object sender, SqlDataSourceStatusEventArgs e) { if (e.Exception != null) { Exception ex = e.Exception; lblUpdateErrors.Text = "There was a problem deleting the update."; ErrorSignal.FromCurrentContext().Raise(ex); e.ExceptionHandled = true; return; } else { lblUpdateErrors.Text = "Update deleted successfully."; gvUpdates.DataBind(); } } </code></pre> <p>Thanks a lot</p>
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