Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "SearchDataGridViewUsingComboBoxTextBox" and then click OK
Step 2: Design your form as below

Step 3: Create a new dataset, then add a Product table from Northwind database to your dataset

Step 4: Add code to handle your form as below
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace SearchDataGridViewUsingComboBoxTextBox
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'database.Products' table. You can move, or remove it, as needed.
this.productsTableAdapter.Fill(this.database.Products);
cboColumn.SelectedIndex = 1;
}
private void txtSearch_KeyDown(object sender, KeyEventArgs e)
{
//Filter data
if (e.KeyCode == Keys.Enter)
{
if (string.IsNullOrEmpty(txtSearch.Text))
productsBindingSource.Filter = string.Empty;
else
productsBindingSource.Filter = string.Format("{0}='{1}'", cboColumn.Text, txtSearch.Text);
}
}
}
}
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