Adding Text to DataGridView Row Header

Question

Does C# allow you to add a String to a RowHeader in a DataGridView? If so, how is it accomplished?

I'm writing a Windows Form to displayed Customer Payment Data for the year so far.

The ColumnHeaders display January, February, March, etc... and rather than have a blank column with DateTime.Now.Year I would like to put it in the RowHeader to make it stand out from the actual payment data.

Answer 1

Yes. First, hook into the column added event:

this.dataGridView1.ColumnAdded += new DataGridViewColumnEventHandler(dataGridView1_ColumnAdded);

Then, in your event handler, just append the text you want to:

private void dataGridView1_ColumnAdded(object sender, DataGridViewColumnEventArgs e)
{
    e.Column.HeaderText += additionalHeaderText;
}

Answer 2

You don't have to use the RowValidated event, that's just the one I used for a little test app to make sure this worked, but this will set the row (not column) header text to whatever year you specify.

It would probably go better in the CellFormatting event, actually.

    private void dataGridView_RowValidated(object sender, DataGridViewCellEventArgs e)
    {
        DataGridView gridView = sender as DataGridView;

        if (null != gridView)
        {
            gridView.Rows[e.RowIndex].HeaderCell.Value = "2009";
        }
    }

EDIT: Here's the entire TestForm I used, as simple as possible to demonstrate the solution. Make sure your RowHeadersWidth is wide enough to display the text.

#region

using System.ComponentModel;
using System.Windows.Forms;

#endregion

namespace DataGridViewTest
{
    public class GridTest : Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private IContainer components;

        private DataGridView dataGridView1;
        private DataGridViewTextBoxColumn Month;

        public GridTest()
        {
            InitializeComponent();
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        private void dataGridView_RowValidated(object sender, DataGridViewCellEventArgs e)
        {
            DataGridView gridView = sender as DataGridView;

            if (null != gridView)
            {
                gridView.Rows[e.RowIndex].HeaderCell.Value = "2009";
            }
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            this.Month = new System.Windows.Forms.DataGridViewTextBoxColumn();
            ((System.ComponentModel.ISupportInitialize) (this.dataGridView1)).BeginInit();
            this.SuspendLayout();
            // 
            // dataGridView1
            // 
            this.dataGridView1.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
            this.dataGridView1.ColumnHeadersHeightSizeMode =
                System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[]
                                                    {
                                                        this.Month
                                                    });
            this.dataGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.dataGridView1.Location = new System.Drawing.Point(0, 0);
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.RowHeadersWidth = 100;
            this.dataGridView1.Size = new System.Drawing.Size(745, 532);
            this.dataGridView1.TabIndex = 0;
            this.dataGridView1.RowValidated +=
                new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView_RowValidated);
            // 
            // Month
            // 
            this.Month.HeaderText = "Month";
            this.Month.Name = "Month";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(745, 532);
            this.Controls.Add(this.dataGridView1);
            this.Name = "Form1";
            this.Text = "Form1";
            ((System.ComponentModel.ISupportInitialize) (this.dataGridView1)).EndInit();
            this.ResumeLayout(false);
        }

        #endregion
    }
}

Answer 3

According MSDN 2008:

    Dim rowNumber As Integer = 1
    For Each row As DataGridViewRow In dgvSample.Rows
        If row.IsNewRow Then Continue For
        row.HeaderCell.Value = rowNumber.ToString
        rowNumber += 1
    Next

but it does not work

Answer 4

datagridview1.Rows[0].HeaderCell.Value = "ur text"; it's work

Answer 5

yes you can

DataGridView1.Rows[0].HeaderCell.Value = "my text";

Answer 6

private void dtgworkingdays_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e) { this.FillRecordNo(); }

private void FillRecordNo() { for (int i = 0; i < this.dtworkingdays.Rows.Count; i++) { this.dtgworkingdays.Rows[i].HeaderCell.Value = (i + 1).ToString(); } }

Answer 7

I tried:

dataGridView1.Rows[0].HeaderCell.Value = "my text";

I don't get any errors, but there is no text. Any possibilities why?

Answer 8

make sure the Enable Column Recording is checked.