Error: Input String is not a correct format

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Hi,

Here I have tried to write a code for deleting a row from gridview but when I clicked on delete button, I get an error: input string is not in correct format.

Here is my delete button code.

C#

protected void gridItem_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["connectionstring"].ToString());
                                   
            SqlCommand sqlDelete = new SqlCommand("delete from product_detail where Product_Id=@Product_Id", con);
            sqlDelete.Parameters.Add("@Product_Id", SqlDbType.Int).Value = Convert.ToInt32(gridItem.Rows[e.RowIndex].Cells[1].Text.Trim());
            sqlDelete.Connection = con;
            con.Open();
            sqlDelete.ExecuteNonQuery();
            con.Dispose();
            con.Close();
            fillgrid();
            gridItem.DataBind();
        }

Please tell me where am I wrong in this code?

Posted 28-Sep-10 19:33pm

call to .net

Updated 28-Sep-10 20:13pm

Sandeep Mewara

v2

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Sandeep Mewara 29-Sep-10 2:13am

Formatted and corrected tags.

3 solutions

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Hiren solanki · Answer 1 · 2010-09-28T19:44:00

Solution 1

I think the probable error is here,

C#

sqlDelete.Parameters.Add("@Product_Id", SqlDbType.Int).Value = Convert.ToInt32(gridItem.Rows[e.RowIndex].Cells[1].Text.Trim());

Have you checked that the Cell value is convertible to Integer ?

or Please specify the line where you are getting error otherwise we can't assume.

Please vote and Accept Answer if it Helped.

Posted 28-Sep-10 19:44pm

Hiren solanki

Comments

honeyashu 29-Sep-10 1:48am

Add '' in your SqlCommand ("delete from product_detail where Product_Id=@Product_Id", con) if your Product ID is of alphanumeric type.

call to .net 29-Sep-10 1:54am

I am getting error on same line but i am not recognizing because product_id is int field in database and also here i have tried to convert same.
but i am getting error.

honeyashu · Answer 2 · 2010-09-28T19:49:00

Add '' in your SqlCommand ("delete from product_detail where Product_Id=@Product_Id", con) if your Product ID is of alphanumeric type.

It is an Integer in db but while getting from grid what it represents: before assigning it try this

int prod_id = Convert.ToInt32(gridItem.Rows[e.RowIndex].Cells[1].Text.Trim().ToString());

sqlDelete.Parameters.Add("@Product_Id", prod_id);

Also put a space in the sqlCommand

SqlCommand sqlDelete = new SqlCommand("delete from product_detail where Product_Id = @Product_Id", con);

Suthish Nair · Answer 3 · 2010-09-28T19:57:00

Solution 3

put a breakpoint and check the line getting error..

i prefer using DataKeyNames property of GridView for getting selected row value instead of gridItem.Rows[e.RowIndex].Cells[1].

Posted 28-Sep-10 19:57pm

Suthish Nair