Input string was not in a correct format.

Question

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C#

using System.Data.SqlClient;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection con;
    int m = 0;
    protected void Page_Load(object sender, EventArgs e)
    {
        con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString);
        if (!Page.IsPostBack)
        {
            BindGridview();
        }
    }

     void BindGridview()
    {
        
        string sqlquery = "select eid,ename,salary from employee12";
        SqlDataAdapter da = new SqlDataAdapter(sqlquery, con);
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridView1.DataSource = ds.Tables["Table"];
        GridView1.DataBind();
    }


    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            Label salary = (Label)e.Row.FindControl("lblsalary");
            //int addsalary = 10 + int.Parse(salary.Text);
            //salary.Text = addsalary.ToString();
            m = m + int.Parse(salary.Text);


        }
        if (e.Row.RowType == DataControlRowType.Footer)
        {
            Label lbltotalprice = (Label)e.Row.FindControl("salary");

            lbltotalprice.Text = m.ToString();
        }

    }

What I have tried:

how to solve? this type of error

Posted 22-Aug-16 21:26pm

Member 12599631

Updated 22-Aug-16 21:37pm

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Comments

CPallini 23-Aug-16 3:28am

You should give us more info about the error (e.g. location of the offending line).

Member 12599631 23-Aug-16 3:32am

m = m + int.Parse(salary.Text);

2 solutions

Solution 2

Reason for the error : you are trying to parse a string to int which is not in an interger format.

C#

m = m + int.Parse(salary.Text); // error

Int.TryParse[^] for casting string to integer

C#

int temp;
if (int.TryParse(salary.Text.Trim(), out temp))
    m = m + temp;

However, you will have to figure out why the Salary.Text is not in an integer format and fix that

Posted 22-Aug-16 21:37pm

Karthik_Mahalingam

Comments

CPallini 23-Aug-16 3:39am

5.

Karthik_Mahalingam 23-Aug-16 3:40am

Thanks CPallini

Member 12599631 23-Aug-16 3:43am

thanks

Karthik_Mahalingam 23-Aug-16 3:47am

welcome

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OriginalGriff · Accepted Answer · 2016-08-22T21:32:00

Solution 1

The value the user entered wasn't a valid integer - so check it and report a problem instead of continuing.
Use int.TryParse instead:

C#

int sal;
if (!int.TryParse(salary.Text, out sal))
    {
    // Report problem to user
    ...
    return;
    }
m += sal;

Posted 22-Aug-16 21:32pm

OriginalGriff

Comments

Member 12599631 23-Aug-16 3:37am

Thanks

OriginalGriff 23-Aug-16 3:59am

You're welcome!

CPallini 23-Aug-16 3:39am

5.