how to show item in combobox as related to another combobox Item

Question

0.00/5 (No votes)

See more:

SQL-Server-2005

C#

string ADDRES = Convert.ToString(comboBox1.SelectedItem);
                SqlConnection con = new SqlConnection();
                con.ConnectionString = "Data source=.;User ID=sa;Password=password;Initial Catalog=bank";
                string sql = "select NAME_PEOPLE from PEOPLE where ADDRESS='@ADDRESS' ";
                SqlCommand cmd=new SqlCommand(sql,con);
                cmd.Parameters.AddWithValue("@ADDRESS", ADDRES);
                 con.Open();
                 SqlDataAdapter ada = new SqlDataAdapter(cmd);
                     
                 DataTable dt = new DataTable();
                    ada.Fill(dt);
                if(comboBox1.SelectedIndex==1)
                {
                        
                     string w=dt.Rows[dt.Rows.Count-1]["NAME_PEOPLE"].ToString();
                            comboBox2.DataSource = dt;
                            comboBox2.DisplayMember = "NAME_PEOPLE";
                }

Posted 5-Feb-15 16:55pm

Member 11431250

Updated 5-Feb-15 17:16pm

Praveen Kumar Upadhyay

v2

Add a Solution

1 solution

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)

Varun_Kumar · Answer 1 · 2015-02-05T17:13:00

Hi

Here i added solution please check that

C#

private void Form2_Load(object sender, EventArgs e)
        {
            comboBox1.Items.Add("a");
            comboBox1.Items.Add("b");
            comboBox1.Items.Add("c");
            comboBox1.Items.Add("d");
            comboBox1.SelectedIndex = -1;
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            var selectedItem = Convert.ToString(comboBox1.SelectedItem);

            //Instead of this code you can read data from database
            DataTable dt = new DataTable();
            dt.Columns.Add("Name", typeof(string));
            for(int i=0;i<3;i++)
            {
                dt.Rows.Add(selectedItem + i);
            }


            comboBox2.DataSource = null;
            comboBox2.DataSource = dt;
            comboBox2.DisplayMember = "Name";
        }