Gridview DataBind Function: Object reference not set to an instance of an object RSS

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  rizwanaarif

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  Gridview DataBind Function: Object reference not set to an instance of an object

  Mar 05, 2019 12:45 PM|rizwanaarif|LINK

  HI All,

  I am facing a strange issue with Gridview control i.e. wherever I am calling .databind method. It throws "Object reference not set to an instance of an object" exception in some cases. I am trying to bind it using a datatable. Gridview is not dynamically created.

   grdPNParent.DataSource = dt;
   grdPNParent.DataBind();

  If I comment this line highlighted in Red. Error goes away.

  Thanks in Advance

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  mgebhard

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  Re: Gridview DataBind Function: Object reference not set to an instance of an object

  Mar 05, 2019 01:15 PM|mgebhard|LINK

  The dt variable is null.  I recommend using the Visual Studio debugger to set a breakpoint and single stepping through your code to find the bug.

  rizwanaarif

  grdPNParent.DataSource = dt;
   grdPNParent.DataBind();

  https://docs.microsoft.com/en-us/visualstudio/debugger/using-breakpoints?view=vs-2017

  https://docs.microsoft.com/en-us/visualstudio/debugger/debugger-feature-tour?view=vs-2017

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  oned_gk

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  Re: Gridview DataBind Function: Object reference not set to an instance of an object

  Mar 06, 2019 02:53 AM|oned_gk|LINK

  How you get grdParent? Is it directly to the control?

  Programming to simplify, don't look for difficult way
  Suwandi - Non Graduate Programmer
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  rizwanaarif

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  Re: Gridview DataBind Function: Object reference not set to an instance of an object

  Mar 06, 2019 09:20 AM|rizwanaarif|LINK

  Hi,

  Thanks for your time looking into it. I figured out the cause. a row_databound in nested (child) grid was causing the issue for in some scenarios.

  Thanks

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  Fei Han - MS...

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  Re: Gridview DataBind Function: Object reference not set to an instance of an object

  Mar 07, 2019 01:53 AM|Fei Han - MSFT|LINK

  Hi rizwanaarif,

  rizwanaarif

  It throws "Object reference not set to an instance of an object" exception

  Normally, if you are trying to access member fields/properties or function on an object reference that points to null, it would cause the issue.

  rizwanaarif

  a row_databound in nested (child) grid was causing the issue for in some scenarios

  As mgebhard mentioned, if you try to set breakpoints within your code logic in code behind methods/events and debug the code step by step, it will be easy find the code snippet that causes the issue.

  With Regards, 

  Fei Han

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