Set ComboBox DisplayMember and ValueMember without using Database in Windows Forms Application

Hi AnkitPal,

Check this example. Now please take its reference and correct your code.

Form Design

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

private void Form1_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] { new DataColumn("Id", typeof(int)), new DataColumn("Name", typeof(string)) });
    dt.Rows.Add(1, "John Hammond");
    dt.Rows.Add(2, "Mudassar Khan");
    dt.Rows.Add(3, "Suzanne Mathews");
    dt.Rows.Add(4, "Robert Schidner");

    //Insert the Default Item to DataTable.
    DataRow row = dt.NewRow();
    row[0] = 0;
    row[1] = "Please select";
    dt.Rows.InsertAt(row, 0);

    //Assign DataTable as DataSource.
    cbCustomers.DataSource = dt;
    cbCustomers.DisplayMember = "Name";
    cbCustomers.ValueMember = "Id";
}

private void btnSubmit_Click(object sender, EventArgs e)
{
    string message = "Name: " + cbCustomers.Text;
    message += Environment.NewLine;
    message += "CustomerId: " + cbCustomers.SelectedValue;
    MessageBox.Show(message);
}

VB.Net

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    Dim dt As DataTable = New DataTable
    dt.Columns.AddRange(New DataColumn() {New DataColumn("Id", GetType(System.Int32)), New DataColumn("Name", GetType(System.String))})
    dt.Rows.Add(1, "John Hammond")
    dt.Rows.Add(2, "Mudassar Khan")
    dt.Rows.Add(3, "Suzanne Mathews")
    dt.Rows.Add(4, "Robert Schidner")
    'Insert the Default Item to DataTable.
    Dim row As DataRow = dt.NewRow
    row(0) = 0
    row(1) = "Please select"
    dt.Rows.InsertAt(row, 0)
    'Assign DataTable as DataSource.
    cbCustomers.DataSource = dt
    cbCustomers.DisplayMember = "Name"
    cbCustomers.ValueMember = "Id"
End Sub

Private Sub btnSubmit_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim message As String = ("Name: " + cbCustomers.Text)
    message = (message + Environment.NewLine)
    message = (message + ("CustomerId: " + cbCustomers.SelectedValue))
    MessageBox.Show(message)
End Sub

Screenshot