How to safe cast dbnull value to int in C#

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Hello
I am retrive the Int value from datagridview to int variable. Some time datagridview row value will be null. at that time it will display

Error (Object cannot be cast from DBNull to other types.

)

Index = Convert.ToInt32(MyGrid.Rows[2].Cells[8].Value);

What I have tried:

I know with below code i can solve this but can you suggest me any other safe way.

if(MyGrid.Rows[2].Cells[8].Value != null)
{
Index = Convert.ToInt32(MyGrid.Rows[2].Cells[8].Value);
}

Posted 12-May-17 22:57pm

AZHAR SAYYAD

Updated 12-May-17 23:27pm

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2 solutions

Solution 2

C#

var index=
    (MyGrid.Rows[2].Cells[8].Value).Equals(null)
    ? 0
    : Convert.ToInt32((MyGrid.Rows[2].Cells[8].Value);

//or try This remove Value from Cell[8]

var index=
    (MyGrid.Rows[2].Cells[8]).Equals(null)
    ? 0
    : Convert.ToInt32((MyGrid.Rows[2].Cells[8].Value);

Posted 12-May-17 23:27pm

omerkamran

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OriginalGriff · Accepted Answer · 2017-05-12T23:09:00

You can't cast a DBNull value to any type: that's what DBNull is saying - it's a special value which says "the database contains no value in this column".
Trying to cast it to an integer is like trying to make this sum work:

x = y +

Y plus what? You don't know, I don't know, and for sure your database doesn't know either! :laugh:

Instead, try this:

C#

object o = MyGrid.Rows[2].Cells[8].Value;
Index = o == DBNull.Value ? 0 : (int) o;

Or replace zero with another default value.