String was not recognized as a valid DateTime. I have this problem on my grid view Row_Data Bound time.please help me!!!

Question

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C#

protected void grdv_RowDataBound(object sender, GridViewRowEventArgs e)
      {
          if (e.Row.RowType == DataControlRowType.Header || e.Row.RowType == DataControlRowType.DataRow)
          {
              e.Row.Cells[0].Visible = true;
              e.Row.Cells[1].Visible = false;
              e.Row.Cells[2].Visible = false;
              e.Row.Cells[3].Visible = true;
              e.Row.Cells[4].Visible = false;
              e.Row.Cells[5].Visible = true;
              e.Row.Cells[6].Visible = true;
              e.Row.Cells[7].Visible = true;
              e.Row.Cells[8].Visible = false;



          }
          if (e.Row.RowType == DataControlRowType.DataRow)
          {
              foreach (TableCell cell in e.Row.Cells)
              {
                  string s = cell.Text;
                  if (cell.Text == "A")
                  {
                      cell.Text = "Active";
                  }
                  if (cell.Text == "I")
                  {
                      cell.Text = "Inactive";
                  }
              }


              DateTime conv = Convert.ToDateTime(e.Row.Cells[3].Text);

              string dat = conv.ToString("dd-MMM-yy");
              e.Row.Cells[3].Text = dat;
              e.Row.Cells[6].Text = dat;

          }
          if (grdv.Rows.Count > 0)
          {
              grdv.HeaderRow.Cells[0].Text = "Edit";
              grdv.HeaderRow.Cells[1].Text = "Attendance Detail Reference";
              grdv.HeaderRow.Cells[2].Text = "Course Detail Reference";
              grdv.HeaderRow.Cells[3].Text = "Date Of Attend";
              grdv.HeaderRow.Cells[4].Text = "Attendance ";
              grdv.HeaderRow.Cells[5].Text = "Reason ";
              grdv.HeaderRow.Cells[6].Text = "Last Updated Date";
              grdv.HeaderRow.Cells[7].Text = "Last Updated By";
              grdv.HeaderRow.Cells[8].Text = "Student id";

          }
      }

DateTime conv = Convert.ToDateTime(e.Row.Cells[3].Text); --i have this line error.this error is String was not recognized as a valid DateTime.

Posted 6-Jun-14 19:33pm

jeevakumar.T

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Comments

DamithSL 7-Jun-14 1:36am

how you store datetime column data in database? what is the column type? if you store datetime as varchar then you better change that to datetime. or otherwise you need to tell us what is the date time string format you used to store the date time as string

jeevakumar.T 7-Jun-14 2:26am

I stored table column name DateTime Not null default (getdate()).

DamithSL 7-Jun-14 2:28am

can you debug and check the value you get as e.Row.Cells[3].Text ?

jeevakumar.T 7-Jun-14 3:19am

yes,I give this one txtdatofaten.Text = Server.HtmlDecode(row.Cells[3].Text);

2 solutions

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DamithSL · Answer 1 · 2014-06-06T19:40:00

if you know the date time format of the string in your database, you can use one of below method to convert it to a DateTime

DateTime.TryParseExact Method[^]
DateTime.ParseExact Method[^]
sample code:

C#

string dateString = "Mon 16 Jun 8:30 AM 2008"; // <-- Valid
string format = "ddd dd MMM h:mm tt yyyy";
DateTime dateTime;
if (DateTime.TryParseExact(dateString, format, CultureInfo.InvariantCulture,
    DateTimeStyles.None, out dateTime))
{
    Console.WriteLine(dateTime);
}

aarif moh shaikh · Answer 2 · 2014-06-06T19:55:00

Solution 2

Try this code .. You will not get this error again... AARIF

DateTime date = DateTime.ParseExact(e.Row.Cells[3].Text, "dd/MM/yyyy", null);

Posted 6-Jun-14 19:55pm

aarif moh shaikh