C# - Required Field Validator Disappears On Dropdownlist Post Back?

Apr 14, 2010

I populate two dropdownlist in asp.net. Both are assigned to a required field validator.

The codebehind is as below

if (!Page.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add("emp");
dt.Columns.Add("ename");

[Code]....

Now what happens is when I choose a field, and then once again go and choose"-- Select--", the validator appears and disappears.

Why doesnt the validator stay? Where am I going wrong?

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I populate two dropdownlist in asp.net. Both are assigned to a required field validator.

The codebehind is as below

[Code]....

the designer code is as below

[Code]....

Now what happens is, when i choose a field from the dropdown and once again when i choose the "-- Select--", the validator appears and then disappears.Where am I going wrong?Why doesnt the validator stay?RegardsHema

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[Code]....

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[Code]....

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