DataGridViewTextBox performs wrapping using word-break. It means if you have a long text, the break will just apply at the end of words. Based on your requirement, you need character-break when word wrapping. To do so, you need to create a custom cell and perform character-break wrapping this way:
Override GetPreferredSize method to calculate the height of Cell/Row based on character break word wrapping. To so so you can use Graphics.MeasureString method.
Override Paint method to draw the wrapped string with character break using Graphics.DrawString method.
You can perform these settings:
To use the width of DataGridView for your column, you should set it's AutoSizeMode to Fill. This way, your column width will fill the grid and will be change its size according to grid size. Also if you had more than one column, you can set FillWeight to control the percent of column size relative to other columns.
To wrap the text in column you should set DefaultCellStyle.WrapMode of the column to DataGridViewTriState.True.
To make the rows auto-size you should set AutoSizeRowMode of DataGridView to DataGridViewAutoSizeRowsMode.AllCells.
Register the custom cell which we created as CellTemplate of the column.
MyDataGridViewTextBoxCell
This cell performs text-wrapping using character-break instead of word break.
public class MyDataGridViewTextBoxCell:DataGridViewTextBoxCell
{
protected override Size GetPreferredSize(Graphics graphics,
DataGridViewCellStyle cellStyle, int rowIndex, Size constraintSize)
{
if(cellStyle.WrapMode== DataGridViewTriState.True && this.RowIndex>=0)
{
var value= string.Format("{0}", this.FormattedValue);
using (var g = this.OwningColumn.DataGridView.CreateGraphics())
{
var r = g.MeasureString(value, cellStyle.Font, this.OwningColumn.Width )
.ToSize();
r.Width += cellStyle.Padding.Left + cellStyle.Padding.Right;
r.Height += cellStyle.Padding.Top + cellStyle.Padding.Bottom;
return r;
}
}
else
{
return base.GetPreferredSize(graphics, cellStyle, rowIndex, constraintSize);
}
}
protected override void Paint(Graphics graphics, Rectangle clipBounds,
Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState,
object value, object formattedValue, string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts)
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value,
formattedValue, errorText, cellStyle, advancedBorderStyle,
paintParts & ~ DataGridViewPaintParts.ContentForeground);
graphics.DrawString(string.Format("{0}", formattedValue),
cellStyle.Font, Brushes.Black, cellBounds);
}
}
Example
public class Model
{
public string Text { get; set; }
}
BindingList<Model> list = new BindingList<Model>();
private void Form1_Load(object sender, EventArgs e)
{
var column1 = new DataGridViewTextBoxColumn();
column1.CellTemplate = new MyDataGridViewTextBoxCell();
column1.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
column1.DataPropertyName = "Text";
column1.DefaultCellStyle = new DataGridViewCellStyle();
column1.DefaultCellStyle.WrapMode = DataGridViewTriState.True;
column1.HeaderText = "Text";
column1.Name = "column1";
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
dataGridView1.Columns.Add(column1);
this.dataGridView1.DataSource = list;
}
private void button1_Click(object sender, EventArgs e)
{
list.Add(new Model() { Text = textBox1.Text });
}
