how to handle combobox selectedindexchanged in c#

Question

1.00/5 (1 vote)

See more:

i have one combobox with flowers,fruits,vegetables
when i select combobox1 in combobox2 it has to display types of fruits(apple,mango,orange)..all this has to be done dynamically means getting the values from sql server

Posted 25-Jun-12 0:43am

Member 9068558

Add a Solution

Comments

DamithSL 25-Jun-12 6:46am

What have you tried so far? can you show the code and where are you stuck?

Sandeep Mewara 25-Jun-12 9:19am

Where are you stuck?

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

ShivKrSingh · Answer 1 · 2012-06-25T00:48:00

Solution 1

you can solve this using a store proc which will provide all data according to group you choose from combo box and then on front end you can call that method on select index change event on windows or can set auto post back property to true if using web application.

Posted 25-Jun-12 0:48am

ShivKrSingh

Sunny_Kumar_ · Answer 2 · 2012-06-25T00:49:00

Solution 2

Just add the event name to "onselectedindexchanged"property of Combobox as :
onselectedindexchanged="ddlEmpName_SelectedIndexChanged"

and add an event handler to code behind like this:

C#

protected void ddlEmpName_SelectedIndexChanged(object sender, EventArgs e)
      {
       
           // Your code here to fetch and assign data from database.

      }

Happy Coding :)

Posted 25-Jun-12 0:49am

Sunny_Kumar_

Comments

Member 9068558 25-Jun-12 6:57am

I worked with this code it's not working...it's showing error at
MaskId = Convert.ToInt32(cmbmoduleid.Text);
----------------------------------------------------------------------
private void cmbmoduleid_SelectedIndexChanged(object sender, EventArgs e)
{
if (cmbmoduleid.SelectedIndex > -1 && cmbmoduleid.SelectedItem != null)
{

if (cmbmoduleid.SelectedText.ToString() != "")
{
MaskId = Convert.ToInt32(cmbmoduleid.Text);
DatasetForm = glbObj.srv.ViewDataSRV(clsGetViewXmlData.GetViewXMLData(gInfo.SchemaName, GlobalSP.FormInsert.Usp_FormInsert_SelectSubModule.ToString(), MaskId));
DataTable Dt = DatasetForm.Tables[0];

//cmbmoduleid.DataSource = new BindingSource(ImpecApplication.Cust.Reports.Global.GLB_FORMS, null);
cmbsubmoduleid.DataSource = Dt;
cmbsubmoduleid.DisplayMember = "SubModule_Name"; //colum you want to show in comboBox
cmbsubmoduleid.ValueMember = "SubModule_ID";
}
}

}

DamithSL 25-Jun-12 7:02am

try MaskId = Convert.ToInt32(cmbmoduleid.SelectedText);

Kamalkant(kk) · Answer 3 · 2012-06-25T00:55:00

Simple In side the Combobox1 fire event you just call a fill method which will retrive data from db and bind in Combobox2.
In Combobox1 do AutoPostBack="True"
like Ex:-

C#

protected void Combobox1_SelectedIndexChanged(object sender, EventArgs e)

    {
        FillMethod(Combobox1.SelectedValue);
    }

public void FillMethod(int CategoryId)
{
//Fetch data from db where id=CategoryId
//Bind data into Combobox2
}