Question

I have a datagridview, and it loads information from db. However, at run time, I want to allow a user to update a cell(which is readonly by default) but I am not able to do this, I need to do this because all the changes are saved in db but if I reload it it, some color style etc will be gone, therefore I want to only reload from db at request and make a change to the text of a read only col, please guide.

Thanks

Answer 1

This is the actual Question of the user

I have a column in datagridview, which by default(I dont set it readonly anywhere in code) readonly. It is coming from a dataset which gets data from a stored procedure, this particular field is a calculated one, so there is no column in the table for it. All other fields which are in table I can manipulate, except for this one. I need to (for only display purposes in datagridview) change this columns value at run time which is causing a readonly error

This is the Answer which solved the user issue.

After you have read the data from dataset, the column for which it is saying read-only, try doing this – ds.Tables[0].Columns["Your New Column"].ReadOnly = false;

Read the comments below for more clarity please.

Ignore the answer & code below because the actual question of the user is in the comments below which I have written above. User should modify his question. Its totally wrong and misleading

Add a Winforms Project, Drop a DataGridView and a Button. Add a click Handler to the Button.

Add a column in DataGridView and name the DataProperty of the column as “Name” in the Designer. Mark it as Read-Only. The column DataPropertyName must match with fields in database. I have a class called Books with a Property called Name. Hence it should be called Name in this case.

Copy Paste the code below and Hit F5.

Click the Button to update the read-only column value.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            List<Book> books = new List<Book>();
            books.Add(new Book() { Name = "C#" });

            InitializeComponent();

            dataGridView1.AutoGenerateColumns = false;
            dataGridView1.DataSource = books;
            dataGridView1.Refresh();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1[0,0].Value = "Winforms";
        }
   }

    public class Book
    {
        public string Name { get; set; }
    }
}

DataGridView Designer Code for Reference:-

// 
            // dataGridView1
            // 
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
            this.Column1});
            this.dataGridView1.Location = new System.Drawing.Point(42, 91);
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.Size = new System.Drawing.Size(270, 157);
            this.dataGridView1.TabIndex = 1;
            // 
            // Column1
            // 
            this.Column1.DataPropertyName = "Name";
            this.Column1.HeaderText = "Name";
            this.Column1.Name = "Column1";
            this.Column1.ReadOnly = true;