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It seems that the data you are getting have Null values...first check if the value is different than Null and then assign it...
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John,<br />
Thank you for your response. &nbsp;Would it be possible for you to provide an example of how to check for a Null value to the added DataGridViewComboBoxColumn<wbr />?<br />
<br />
Thank you,<br />
mrotor
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Create a query in your dataset that filters out Null...
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Thank you Ark,<br />
Will try your suggestion.<br />
<br />
<br />
mrotor
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<div class="content wysiwyg-content">
Hi Experts,<br />
I add a DataGridViewComboBoxColumn<wbr /> to my DataGridViewControl in my VB.Net application.<br />
I need help troubleshooting, and adding error trapping code.<br />
<br />
I get an error when the &quot;blank&quot; option is selected (I have included and image of the error below).<br />
<br />
Please help me and let me know how I can prevent this error from ocurring. &nbsp;Thank you.<br />
<br />
<b>MY CODE</b><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150195/DataGridViewComboBoxColumnCode.PNG" target="_blank" title="Code (19 KB)"><img alt="Code" class="file-block lazyload" style="max-width: 504px;" data-src="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150195/DataGridViewComboBoxColumnCode.PNG" /></a><br />
<b>MY INTERFACE</b><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150196/EmptyValue.PNG" target="_blank" title="Empty Value Selected (64 KB)"><img alt="Empty Value Selected" class="file-block lazyload" style="max-width: 321px;" data-src="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150196/EmptyValue.PNG" /></a><br />
<b>THE ERROR I GET</b><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150197/ErrorDGV.PNG" target="_blank" title="Error (40 KB)"><img alt="Error" class="file-block lazyload" style="max-width: 498px;" data-src="https://filedb.experts-exchange.com/incoming/2017/03_w10/1150197/ErrorDGV.PNG" /></a><br />
<br />
Thank you all for your help in advance,<br />
mrotor
</div>
</div>


EmptyValue.PNG

DataGridViewComboBoxColumnCode.PNG

ErrorDGV.PNG

Hi Experts,
I add a DataGridViewComboBoxColumn to my DataGridViewControl in my VB.Net application.
I need help troubleshooting, and adding error trapping code.

I get an error when the "blank" option is selected (I have included and image of the error below).

Please help me and let me know how I can prevent this error from ocurring.  Thank you.

MY CODE


MY INTERFACE


THE ERROR I GET



Thank you all for your help in advance,
mrotor

I need help adding error trapping code to a  DataGridViewComboBoxColumn in my VB.Net application

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,

Visual Basic.NET

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.