CODEWITHSUNDEEP
asp.net
sam
sam

Reputation: 107

input string was not in correct format asp.net

I have a strange error. I have a page which loads values according to the country value stored in the session. it works fine for all other countries. only for particular country it is returning this error.

protected void populateDDMonth()
{
    int numberOfMonths;
    string monthName;
    string completeCalendarFile = Path.Combine(Request.PhysicalApplicationPath + "admin\\text-files\\", calendarFile);
    TextReader tr = new StreamReader(completeCalendarFile);
    date_classa = tr.ReadLine(); //Get classa end date string
    date_classb = tr.ReadLine(); //Get classb end date string
    DateTime dateConvert_classa = DateTime.Parse(date_classa); 
    DateTime dateConvert_classb = DateTime.Parse(date_classb);
    tr.Close();
    DataTable MonthTable = new DataTable();
    MonthTable.Columns.Add("Month", typeof(string));
    MonthTable.Columns.Add("Date", typeof(string));
    DateTime endMonth = DateTime.Today;
    DDMonth.Items.Clear(); //Clear dropdown in order to re-populate
    string classValue = DDClassType.SelectedValue.ToString();

    if (classValue == "10" || classValue == "12" || classValue == "15")
    {
        endMonth = dateConvert_classa;
    }
    else if (classValue == "9" || classValue == "13" || classValue == "16")
    {
        endMonth = dateConvert_classb;
    }
    if (endMonth.Year > DateTime.Today.Year)
    {
        numberOfMonths = (endMonth.Month + 12) - DateTime.Today.Month;
    }
    else
    {
        numberOfMonths = endMonth.Month - DateTime.Today.Month;
    }
    for (int i = 0; i < numberOfMonths + 1; i++)
    {
        monthName = DateTime.Now.AddMonths(i).ToString("MMM"); //Display month as 3 letter string
        DataRow MonthRow = MonthTable.NewRow();
        MonthRow[0] = monthName.ToString() + " " + DateTime.Now.AddMonths(i).Year.ToString();
        MonthRow[1] = DateTime.Now.AddMonths(i).ToString();
        DDMonth.Items.Add(new ListItem(monthName.ToString() + " " + DateTime.Now.AddMonths(i).Year.ToString(),
        DateTime.Now.AddMonths(i).ToString()));
    }
    if (Session["selectedMonth"] != null)
    {
        DDMonth.SelectedValue = Session["selectedMonth"].ToString();
    }

    if (!Page.IsPostBack)
    {

        DateTime startingDate = DateTime.Parse(DDMonth.SelectedValue.ToString());
        LbCalendarCurrentMonth.Text = startingDate.ToString("MMMM");

    }
}

Upvotes: 2

Views: 5741

Answers (2)

Shadow Wizzard
Shadow Wizzard

Reputation: 66398

Whatever value is selected (if any) in DDMonth drop down, is not a valid date.

So the following code should work without error:

DateTime startingDate;
if (DateTime.TryParse(DDMonth.SelectedValue.ToString(), out startingDate)
{
   LbCalendarCurrentMonth.Text = startingDate.ToString("MMMM");
}

Upvotes: 0

Joel Etherton
Joel Etherton

Reputation: 37543

This is a common problem with int casts and conversions within the International cultures:

http://support.microsoft.com/kb/942460

Upvotes: 1

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