DataGridView ReadOnly rows and columns in VB.NET

The DataGridView control in Windows Forms is capable of displaying rows of data retrieved from a data source. To enhance its functionality and tailor it to specific application requirements, you have several options for extending the DataGridView control.

One important property of the DataGridView control is the ReadOnly property, which determines whether the data displayed within a cell can be edited by the user or not. This property can be configured at three levels: the cell level, the column level, and the control level.

Cell Level ReadOnly Property

At the cell level, you can specify whether an individual cell is editable or read-only. By setting the ReadOnly property of a specific cell to True, you can prevent users from modifying its contents.

Column Level ReadOnly Property

At the column level, you can set the ReadOnly property for an entire column. This allows you to make all cells within the column either editable or read-only. By setting the ReadOnly property of a column to True, you ensure that users cannot modify any cells within that column.

Control Level ReadOnly Property

At the control level, you can set the ReadOnly property for the entire DataGridView control. This property applies to all cells and columns within the control. Setting the ReadOnly property of the DataGridView control to True makes all cells read-only, preventing any modifications.

The following vb.net source code shows how to make a row as Readonly in a DataGridView.

Full Source VB.NET
Imports System.Data.SqlClient Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click DataGridView1.ColumnCount = 3 DataGridView1.Columns(0).Name = "Product ID" DataGridView1.Columns(1).Name = "Product Name" DataGridView1.Columns(2).Name = "Product_Price" Dim row As String() = New String() {"1", "Product 1", "1000"} DataGridView1.Rows.Add(row) row = New String() {"2", "Product 2", "2000"} DataGridView1.Rows.Add(row) row = New String() {"3", "Product 3", "3000"} DataGridView1.Rows.Add(row) row = New String() {"4", "Product 4", "4000"} DataGridView1.Rows.Add(row) DataGridView1.Rows(1).ReadOnly = True End Sub End Class

Conclusion

Through careful configuration of the ReadOnly property, you can control the editing behavior of the DataGridView control at different levels, granting you the ability to create sophisticated and tailored data presentation and interaction within your applications.






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