C Sharp Textchanged event problem

Question

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In my asp.net Application there is a dropdownList named "ddlWarrenty" Where have some hard coded item such as
'1 Year'
'2 Year'
etc.
Also two textbox named 'dptPurchaseDate' and 'dptPurchaseDateEx'
My expectation is that when user select '1 Year' from 'ddlWarrenty' and input a datetime in
'dptPurchaseDate' then 'dptPurchaseDateEx' will be show a date by adding 'ddlWarrenty' and
'dptPurchaseDate'

I have tried this in the following way. But it does not work. I wrote the code in the textchanged event of dptPurchaseDate

C#

if(ddlWarrenty.SelectedItem.Text.Trim() == "1 Year")
{
      DateTime dtday = Convert.ToDateTime(dptPurchaseDate.Text.Trim());
      dptPurchaseDateEx.Text = (Convert.ToInt32(dtday) +         Convert.ToInt32(dtday.AddYears(1))).ToString();
}

Posted 12-May-13 18:03pm

Sumon562

Updated 12-May-13 18:58pm

_Amy

v4

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_Amy 13-May-13 0:10am

Your expectation is in Windows application or web application?

Sumon562 13-May-13 0:12am

Web Application

1 solution

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_Amy · Accepted Answer · 2013-05-12T19:02:00

Solution 1

Use OnSelectedIndexChanged event of DropDownList. Try this:

C#

protected void ddlWarrenty_SelectedIndexChanged(object sender, EventArgs e)
{
    if(ddlWarrenty.SelectedItem.Text.Trim() == "1 Year")
    {
          DateTime dtday = Convert.ToDateTime(dptPurchaseDate.Text.Trim());
          dptPurchaseDateEx.Text = (Convert.ToInt32(dtday) +         Convert.ToInt32(dtday.AddYears(1))).ToString();
    }
}

--Amit

Posted 12-May-13 19:02pm

_Amy

Comments

Sumon562 13-May-13 1:41am

Thank you Mr._Amy. I have tried but it does not work.

_Amy 13-May-13 2:21am

Check AutoPostBack property of your DropDownList and set it to true.

Sumon562 14-May-13 1:01am

Thank you Mr. _Amy. It works nicely

_Amy 14-May-13 1:23am

Welcome. :)