dropdown values not validating properly

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I am using two drop down.

drop1 values contains 8
drop2 alues contains 6.

My validation is drop2 values should be greater always.
It will validate only 10 and above not validating less than 10.

what is the proplem...

see my code

VB

If Trim(drp1.SelectedValue) < Trim(drp2.SelectedValue) Then
           Dim myscript As String = "alert('To values should be greater than from values');"
           System.Web.UI.ScriptManager.RegisterClientScriptBlock(Me.Page, Me.GetType(), "myscript", myscript, True)
           drpFrmWk.Focus()
           Flag = False
           Return 0
End If

Posted 16-Jan-12 21:54pm

gani7787

Updated 16-Jan-12 22:11pm

Prerak Patel

v2

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Prerak Patel · Accepted Answer · 2012-01-16T22:13:00

Solution 1

Check with this. You are comparing strings instead of integers.

VB

If Convert.ToInt32(Trim(drp1.SelectedValue)) < Convert.ToInt32(Trim(drp2.SelectedValue)) Then

Posted 16-Jan-12 22:13pm

Prerak Patel

sriman.ch · Accepted Answer · 2012-01-16T22:41:00

Try the following

SQL

if (int.Parse(ddl1.SelectedValue.Trim()) >int.Parse(ddl2.SelectedValue.Trim()))
            {
                ScriptManager.RegisterStartupScript(this,this.GetType(),"Test","alert('To value must be greater than from value');",false);

            }

Dropdownlist selected value will be in string format so if you wanna compare the integer values you have to convert them into intergers using any parse/converstion methods

Hope this helps.