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    I am Using ASP Dot Net-2.0 with SQL server-2005

    in Save button i have both  condition are Insert and update condition

    here like the code

    Save_click()

    {

    BLClass objBL=new BLClass();

    int Result;

    Switch(ViewState["Mode"].ToString())

    {

    case"New":

    Result=objBL.InsertRecords(txtName.text,txtAddress.text);

    break;

    case"Edit":

    Result=objBL.UpdateRecords(ViewState["ID"].ToString(),txtName.text,txtAddress.text);

    break;

    }

    Dataset ds=new Dataset();

    ds=objBL.SelectRecords();

    gv.DataSource=ds.Tables[0].DefaultView;

    gv.DataBind();

    }

    When i do this i got Error is Null Reference was unhandeled by the user code pls give the help for this code i need to use now

    • Moved by SamAgain Friday, August 6, 2010 7:28 AM (From:.NET Base Class Library)
    Wednesday, July 14, 2010 4:59 AM

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    Hi Naveen,

    Check whether the ViewState["Mode"] has any value. There is a possibility of this exception being raised when the value is null and you try to use ToString() function on that, So check whether ViewState["Mode"] is having any value at all.

     

    This question is specific to ASP.Net, Please post it at forums.asp.net

     

    Thanks & Regards,

    Sai Pavan

    [Please mark the post as answer if it answers your question]

    • Edited by Sai Pavan Viswanath Wednesday, July 14, 2010 6:28 AM updated the signature
    • Proposed as answer by Chethan Kamath Wednesday, July 14, 2010 6:41 AM
    • Marked as answer by SamAgain Wednesday, July 14, 2010 10:07 AM
    Wednesday, July 14, 2010 5:10 AM

All replies

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    The objBL.SelectRecords() might be returning a null data object. when you try to set it as the datasource of the gridview, it will give a null reference.

    P.S: For any questions specific to asp.net, please post at www.asp.net/forums

    Ganesh Ranganathan
    [Please mark the post as answer if it answers your question]
    blog.ganeshzone.net
    Wednesday, July 14, 2010 5:02 AM
  • Question
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    Hi Naveen,

    Check whether the ViewState["Mode"] has any value. There is a possibility of this exception being raised when the value is null and you try to use ToString() function on that, So check whether ViewState["Mode"] is having any value at all.

     

    This question is specific to ASP.Net, Please post it at forums.asp.net

     

    Thanks & Regards,

    Sai Pavan

    [Please mark the post as answer if it answers your question]

    • Edited by Sai Pavan Viswanath Wednesday, July 14, 2010 6:28 AM updated the signature
    • Proposed as answer by Chethan Kamath Wednesday, July 14, 2010 6:41 AM
    • Marked as answer by SamAgain Wednesday, July 14, 2010 10:07 AM
    Wednesday, July 14, 2010 5:10 AM
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    Hi,

      Thanks for your post. Please consider http://forums.asp.net as a better option.

    Please mark the right answer at right time.
    Thanks,
    Sam
    Friday, August 6, 2010 7:28 AM