Object cannot be cast from dbnull to other types. How to fix it

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protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{

if (e.Row.RowType == DataControlRowType.DataRow)
{
TotalPrice += Convert.ToDouble(DataBinder.Eval(e.Row.DataItem,"PrePie"));

}
else if(e.Row.RowType == DataControlRowType.Footer)
{
e.Row.Cells[7].Text = TotalPrice.ToString();
e.Row.Cells[7].Font.Bold = true;

}
}

What I have tried:

C#

Object cannot be cast from DBNull to other types. how to fix it

Please help

Posted 12-Dec-16 7:04am

Member 12857358

Updated 12-Dec-16 7:30am

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Michael_Davies · Answer 1 · 2016-12-12T07:30:00

Solution 1

You do not say which line produces the error but I am guessing it is:

C#

TotalPrice += Convert.ToDouble(DataBinder.Eval(e.Row.DataItem,"PrePie"));

You cannot assume a value is in the gridview cell, test PrePie has a value before you use it and take appropriate action if it is nul.

Posted 12-Dec-16 7:30am

Michael_Davies

Updated 12-Dec-16 10:07am

v2

Comments

Member 12857358 13-Dec-16 5:04am

if PrePie contains a null value then how to assign 0 in it.

Michael_Davies 13-Dec-16 5:46am

Test PrePie's value if it is NOT null then add it to TotalPrice