Type conversion Error

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C#

protected void gvProd_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        decimal total = 0;
        decimal profit = 0;
        if (e.Row.RowType == DataControlRowType.DataRow)
        {

            Label lblTotal=(Label)e.Row.FindControl("lbltotal");
            total = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "AchievedPer"));
            string stotal = Convert.ToDecimal(total).ToString() ;
            lblTotal.Text = stotal; // Here error occurs
        }
    }

Error message: Object Reference not set to an instance of an object.

Posted 19-Mar-14 23:54pm

Gladiator3

Updated 20-Mar-14 0:06am

lukeer

v2

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Krunal Rohit 20-Mar-14 6:01am

Code looks promising.
You sure there is a label with mentioned name ?

-KR

lukeer 20-Mar-14 6:10am

What data type is there originally in e.Row.DataItem?

Your'e converting it to decimal, convert the result, which is a decimal to decimal again, and then to string for displaying it. Maybe there is a shorter, less error prone conversion path?

3 solutions

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Anudeep Jaiswal - MCA · Answer 1 · 2014-03-20T00:21:00

Solution 1

Mostly, This Error Occurred If You Can Not Find Control In Page Like "lbltotal".
Please Check This.
Hope This Will Help You.

Posted 20-Mar-14 0:21am

Anudeep Jaiswal - MCA

Comments

CHill60 20-Mar-14 8:01am

Agreed - if the error occurs where the OP's comment indicates then the earlier Label lblTotal=(Label)e.Row.FindControl("lbltotal"); failed to find the control "lbltotal" ... therefore variable lblTotal is null.
Note to OP - check your spelling and letter-case

norbitrial · Answer 2 · 2014-03-20T00:32:00

Always check the value of a variable if it could be null!

C#

protected void gvProd_RowDataBound(object sender, GridViewRowEventArgs e)
{
    decimal total = 0,
            profit = 0;

    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        object AchievedPer = DataBinder.Eval(e.Row.DataItem, "AchievedPer");

        if(AchievedPer != null)
        {
            object obj = e.Row.FindControl("lbltotal");

            if(obj != null)
            {
                Label lblTotal = (Label)obj;
                lblTotal.Text = AchievedPer.ToString();
            }
        }
    }
}

Abhinav S · Answer 3 · 2014-03-20T00:24:00

Solution 2

onvert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "AchievedPer"));

You cannot convert a string type to decimal.

Posted 20-Mar-14 0:24am

Abhinav S

Comments

CHill60 20-Mar-14 7:59am

But ToDecimal takes a String, and it looks like field "AchievedPer" holds a percentage, so what would be the problem with this line?

Abhinav S 20-Mar-14 8:03am

Percentage % cannot be converted to an integer.

CHill60 20-Mar-14 8:17am

I guess that's why the OP used ToDecimal :-)

Gladiator3 21-Mar-14 0:15am

Hi,
It holds a decimal, only the naming looks like it is percentage...
Still,problem not solved...
Please check the code:
protected void gvProd_RowDataBound(object sender, GridViewRowEventArgs e)
{
decimal total = 0;
decimal profit = 0;
if (e.Row.RowType == DataControlRowType.DataRow)
{

Label lblTotal=(Label)e.Row.FindControl("lbltotal");
total = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "AchievedPer"));
string stotal = Convert.ToDecimal(total).ToString() ;<--decimal value is saved as string
lblTotal.Text = stotal; // Here error occurs<---then why I'm unable to put a string value to a label,which accepts string values..?
}
}

CHill60 21-Mar-14 5:18am

See solution 1 and my comments to that solution. You do not have a label control called "lbltotal" ... perhaps it is called "lblTotal"?

Type conversion Error

3 solutions

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