Conversion from type 'DBNull' to type 'String' is not valid in DataGridView_CellClick. www.hepspace.com
Cuando realizamos un Data Reader a una base de datos y cualquier campo nos regresa Null, nos provoca este error, aquí la solución.
Please visit http://www.technomark.in/Unable-To-Cast-Object-Of-Type-%27System-DBNull%27-To-Type-%27System-String%27.aspx for more information In this video, we have explained about following thing Unable to cast object of type 'System DBNull' to type 'System String' Complete steps is described in this video regarding How To Solve Unable to cast object of type 'System DBNull' to type 'System String' If you got any clarification on this, please write it on Comment section. We will definitely update you back.
Set Datetimepicker format value to null or empty in c# the official way to perform this operation in asp.net c#.
The value for column 'IsPrimaryKey' in table 'TableDetails' is DBNull
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This video explains handling NULL values in Gridview and this can be achieved in few steps very easily. 1. Drag the Gridview from Toolbox to desing surface 2. Set up Templates using Template Field in Gridview 3. Bind Gridview from Code behind 4. Configure Gridview Row Data Bound Event 5. Find the NULL and Fix it. If this video helps you in some way then please subscribe to my channel and give me a thumbs up. In case of queries please comment below and let me know.