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POPopulating a variable with DetailsView textbox data value
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2012-11-13T15:38:47.353
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When an ASP.Net DetailsView data is first displayed, can you tell me how to populate the variable shown in this coding? I already tried this in the code-behind file but was shown an error that: <pre><code>Object reference not set to an instance of an object. </code></pre> This is the coding: <pre><code>Protected Sub DetailsViewDetails_DataBound(sender As Object, e As EventArgs) Handles DetailsViewDetails.DataBound Dim txtOriginalRegistrationFee As TextBox If DetailsViewDetails.CurrentMode = DetailsViewMode.Edit Then txtOriginalRegistrationFee = FindControl("TextBoxRegistrationFee") If String.IsNullOrEmpty(txtOriginalRegistrationFee.Text) = False Then MsgBox(txtOriginalRegistrationFee) End If End If End Sub </code></pre> This is from the aspx file: <pre><code><asp:TemplateField HeaderText="RegistrationFee" SortExpression="RegistrationFee"> <EditItemTemplate> <asp:TextBox ID="TextBoxRegistrationFee" runat="server" Text='<%# Eval("RegistrationFee") %>'></asp:TextBox> </EditItemTemplate> <InsertItemTemplate> <asp:TextBox ID="TextBoxRegistrationFee" runat="server" Text='<%# Bind("RegistrationFee") %>'></asp:TextBox> </InsertItemTemplate> <ItemTemplate> <asp:Label ID="LabelRegistrationFee" runat="server" Text='<%# Bind("RegistrationFee", "{0:c}") %>'></asp:Label> </ItemTemplate> <ItemStyle ForeColor="Blue" /> </asp:TemplateField> </code></pre> * Update * I tried using this coding updated based on your help but still get the "Object reference not set to an instance of an object." error when clicking the edit button of the DetailsView.
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<asp.net><vb.net><detailsview>
Title
Populating a variable with DetailsView textbox data value
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.