DataGridview单元格在WinForms应用程序C＃中不消耗

Question

I have a simple datagridview contain two columns . I want to add text from textbox by pressing a button to column1 cell but it show only one text not the other and first one text replace the second one .

I want to add text from textbox to column1 cell as much as I want by pressing a button .

as in image showed

      this.dataGridView1.DefaultCellStyle.WrapMode =
         DataGridViewTriState.True;
        dataGridView1.AutoSizeRowsMode = 
     DataGridViewAutoSizeRowsMode.AllCells;

        dataGridView1.Rows[0].Cells[0].Value = textBox1.Text + 
      Environment.NewLine;

Answer 1

Then you should try something like this:

        string tmp = "";
    private void button1_Click(object sender, EventArgs e)
    {
        this.dataGridView1.DefaultCellStyle.WrapMode =
     DataGridViewTriState.True;
        dataGridView1.AutoSizeRowsMode =
     DataGridViewAutoSizeRowsMode.AllCells;

        tmp += textBox1.Text + Environment.NewLine;

        dataGridView1.Rows[0].Cells[0].Value = tmp;
    }

Answer 2

doing slight change will help you to achieve the expected result

dataGridView1.Rows[0].Cells[0].Value += textBox1.Text + Environment.NewLine;

or

Read your cell data and append your new data and then replace the cell value

        this.dataGridView1.DefaultCellStyle.WrapMode =
 DataGridViewTriState.True;
        dataGridView1.AutoSizeRowsMode =
     DataGridViewAutoSizeRowsMode.AllCells;
        var tmp = dataGridView1.Rows[0].Cells[0].Value;
        tmp += textBox1.Text + Environment.NewLine;

        dataGridView1.Rows[0].Cells[0].Value = tmp;