problem assigning data into a text box based on selection from drilldown

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A form with the undernoted

1. Disbursement Type (ddl) : ddl_Disburs_Type (Text)

2. Amount Approved : txt_Expect_Amt (Text)

3. Actual Disbursement : txt_Actual_Disb (Text)

The Drill down (i.e. Disbursement Type) has 2 items a. FULL b. TRANCHE

When the option FULL is selected the program has to do the following .

However control does not switch over.

please assist

C#

protected void ddl_Disburs_Type_SelectedIndexChanged(object sender, EventArgs e)
     {

         if (ddl_Disburs_Type.Text == "FULL")
         {

             txt_Tranche.Text = "0";
             txt_Tranche.Enabled = false;
             txt_Actual_Disb.Text = txt_Expect_Amt.Text;

             decimal KExpect_Amt = Convert.ToDecimal(txt_Expect_Amt.Text);
             txt_Expect_Amt.Text = KExpect_Amt.ToString("N");

             //decimal KActual_Disb = Convert.ToDecimal(txt_Actual_Disb.Text);
             decimal KActual_Disb = Convert.ToDecimal(txt_Expect_Amt.Text);
             txt_Actual_Disb.Text = KActual_Disb.ToString("N");

Posted 15-Nov-14 22:32pm

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Manas Bhardwaj · Answer 1 · 2014-11-15T22:45:00

Did you try to debug your code? That should give you a clear idea why it does not work.

Look on MSDN, how to debug ASP.Net Apps using VS:

http://msdn.microsoft.com/en-us/library/w2faa92k.aspx[^]

On another note, it's always good to compare string irrespective of casing in such situations.

And also, I would also put FULL in constant or a resource string instead of a magic string[^].

C#

if(String.Compare(ddl_Disburs_Type.Text, const_resource_Full, true) == 0)
{
    //you logic here
}

DamithSL · Answer 2 · 2014-11-15T23:28:00

apart from Manas Answer, in ASP.NET DropDownList [^]is not postback on selected item change by default. Even you have added SelectedIndexChanged [^]event to your DropDownList it will not excute it unless you set the AutoPostBack [^]Property as true. Sample code :

<asp:dropdownlist id="ColorList" xmlns:asp="#unknown">
                   AutoPostBack="True"
                   OnSelectedIndexChanged="Selection_Change"
                   runat="server"></asp:dropdownlist>

After you set above property, put break point inside the event handler and run the web application. You can check what is the value you receive as Text property of the DropDownList. According to that you can change the code or it will help you to find solution for why your code block not functioning as you expected.
additional learning resources for debugging if you interested:
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Advanced Debugging in Visual Studio[^]

problem assigning data into a text box based on selection from drilldown

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