In this article I will explain with an example, how to display DataGridView selected Row in TextBoxes in Windows FormsForms (WinForms) Application using C# and VB.Net.
The DataGridView will be assigned CellMouseClick event handler.
When the DataGridView Row or Cell is clicked, the Row Index of the clicked DataGridView Row is determined and the values of the Cells are extracted and displayed in TextBoxes in Windows Forms (WinForms) Application using C# and VB.Net.
 
 

Form Design

The Form consists of a DataGridView and three TextBoxes. The DataGridView has been assigned CellMouseClick event handler.
Display DataGridView Selected Row in TextBoxes in Windows Application using C# and VB.Net
 
 

Namespaces

You will need to import the following namespace.
C#
using System.Data; 
 
VB.Net
Imports System.Data
 
 

Populating the DataGridView

Inside the Form Load event handler, an object of DataTable is created.
Then, three columns are added to the DataTable Columns collection using the AddRange method.
Inside the AddRange method, an Array of the objects of type DataColumn is specified to which, the name and the optional parameter Data Type i.e. the Type of the column is passed.
Once the schema is ready i.e. all the columns are defined and some rows have been added using the Rows.Add method.
Finally, DataTable object is assigned to the DataSource property of the DataGridView and the DataGridView is populated.
C#
private void Form1_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[3] {
                        new DataColumn("Id", typeof(int)), 
                        new DataColumn("Name", typeof(string)), 
                        new DataColumn("Country", typeof(string)) });
    dt.Rows.Add(1, "John Hammond", "United States");
    dt.Rows.Add(2, "Mudassar Khan", "India");
    dt.Rows.Add(3, "Suzanne Mathews", "France");
    dt.Rows.Add(4, "Robert Schidner", "Russia");
    this.dataGridView1.DataSource = dt;
    this.dataGridView1.AllowUserToAddRows = false;
} 
 
VB.Net
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    Dim dt As New DataTable()
    dt.Columns.AddRange(New DataColumn() {
                        New DataColumn("Id", GetType(Integer)), 
                        New DataColumn("Name", GetType(String)), 
                        New DataColumn("Country", GetType(String))})
    dt.Rows.Add(1, "John Hammond", "United States")
    dt.Rows.Add(2, "Mudassar Khan", "India")
    dt.Rows.Add(3, "Suzanne Mathews", "France")
    dt.Rows.Add(4, "Robert Schidner", "Russia")
    Me.dataGridView1.DataSource = dt
    Me.dataGridView1.AllowUserToAddRows = False
End Sub
 
 

Displaying DataGridView Selected Row in TextBoxes

When the DataGridView Row or Cell is clicked, the Row Index of the clicked DataGridView Row is determined and the values of the Cells are extracted and displayed in TextBoxes in Windows Forms (WinForms) Application using C# and VB.Net.
C#
private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.RowIndex >= 0)
    {
        DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
        txtID.Text = row.Cells[0].Value.ToString();
        txtName.Text = row.Cells[1].Value.ToString();
        txtCountry.Text = row.Cells[2].Value.ToString();
    }
}
 
VB.Net
Private Sub dataGridView1_CellMouseClick(sender As System.Object, e As System.Windows.Forms.DataGridViewCellMouseEventArgs)Handles dataGridView1.CellMouseClick
    If e.RowIndex >= 0 Then
        Dim row As DataGridViewRow = dataGridView1.Rows(e.RowIndex)
        txtID.Text = row.Cells(0).Value.ToString
        txtName.Text = row.Cells(1).Value.ToString
        txtCountry.Text = row.Cells(2).Value.ToString
    End If
End Sub
 
 

Screenshot

Display DataGridView Selected Row in TextBoxes in Windows Application using C# and VB.Net
 
 

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