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Hi,<br />
<br />
Have you tried to do using following statement-<br />
<br />
comboBox1.SelectedIndex = -1
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The Selected Index becomes -1 when when the selection is cleared. &nbsp;My problem is that it doesn't trigger an update of Null back to the bound field.
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I ended up writing the following event handler to handle the validating event &nbsp;...<br />
<br />

<pre><code class="code-10 nolinks" id="code-20-42832622-1"><span>        Dim cbx As acComboBox</span>
<span></span>
<span>        cbx = CType(sender, acComboBox)</span>
<span></span>
<span>        If cbx.Text = String.Empty Then</span>
<span>            If cbx.DataBindings.Count &gt; 0 Then</span>
<span>                cbx.DataBindings(0).WriteValue()</span>
<span>            End If</span>
<span>            Exit Sub</span>
<span>        End If</span>
<span></span>
<span>        If cbx.SelectedItem Is Nothing Then</span>
<span>            MessageBox.Show(&quot;Enter an Item from the List.&quot;)</span>
<span>            e.Cancel = True</span>
<span>        End If</span>
</code></pre>
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<div class="content wysiwyg-content">
In vb.net, I have a combobox's &quot;SelectedValue&quot; property bound to a field of a datatable. &nbsp;When I select an item from the combobox, the SelectedValue gets saved and the ColumnChanged event of the DataTable is triggered; however, when I clear the combobox, neither the SelectValue gets saved to the DataTable nor does the ColumnChanged event get triggered. &nbsp;How can I get a Null value to be saved to the bound field of the DataTable when the combobox is cleared?
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In vb.net, I have a combobox's "SelectedValue" property bound to a field of a datatable.  When I select an item from the combobox, the SelectedValue gets saved and the ColumnChanged event of the DataTable is triggered; however, when I clear the combobox, neither the SelectValue gets saved to the DataTable nor does the ColumnChanged event get triggered.  How can I get a Null value to be saved to the bound field of the DataTable when the combobox is cleared?

Saving a Null Value to a DataTable when a bound combobox is Cleared

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,