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copied!<p>It's definitely an unusual thing to do - but (like anything else) it can be done. It's a question of measuring the size of the string and comparing it with the size of the cell. (Note that I assume that the data is entered by a user. If you're databinding you basically have to consume other events.) </p> <p>This works but might need some fine tuning:</p> <pre><code>public partial class Form1 : Form { public Form1() { InitializeComponent(); dataGridView1.Columns.Add("col1", "col1"); dataGridView1.Columns[0].CellTemplate.Style.Alignment = DataGridViewContentAlignment.MiddleRight; dataGridView1.Columns.Add("col2", "col2"); dataGridView1.Columns.Add("col3", "col3"); dataGridView1.Rows.Add(); dataGridView1.CellEndEdit += new DataGridViewCellEventHandler(dataGridView1_CellEndEdit); dataGridView1.ColumnWidthChanged += new DataGridViewColumnEventHandler(dataGridView1_ColumnWidthChanged); } void dataGridView1_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e) { if (e.Column.Index == 0) { // We need to truncate everything again when the width changes foreach (DataGridViewRow row in dataGridView1.Rows) { RightTruncateText(row.Cells[0]); } } } void RightTruncateText(DataGridViewCell cell) { // check if the content is too long: using (Graphics g = Graphics.FromHwnd(this.Handle)) { SizeF size = g.MeasureString((string)cell.Tag, dataGridView1.Font); // NOTE: using the tag if (size.Width > cell.Size.Width) { StringBuilder truncated = new StringBuilder((string)cell.Tag); truncated.Insert(0, "..."); // Truncate the string until small enough (NOTE: not optimized in any way!) while (size.Width > cell.Size.Width) { truncated.Remove(3, 1); size = g.MeasureString(truncated.ToString(), dataGridView1.Font); } cell.Value = truncated.ToString(); } else { cell.Value = cell.Tag; } } } void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e) { if (e.ColumnIndex == 0) { // Save the value in the tag but show the truncated value DataGridViewCell cell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex]; cell.Tag = cell.Value; // Saving the actual state RightTruncateText(cell); } } } </code></pre>

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