DataGridView column format

问题

There is my reading to DGV

public void ReadFromDB()
{
    dataset = DB.ReadFromDB("SELECT * FROM orders");
    dataGridView1.DataSource = dataset.Tables[0];

    //another columns....

    DataGridViewColumn sellDate = new DataGridViewTextBoxColumn();
    sellDate.DataPropertyName = "sell_date";
    sellDate.ReadOnly = true;
    sellDate.Name = "Дата продажи";
    dataGridView1.Columns.Add(sellDate);
    dataGridView1.Columns[4].DefaultCellStyle.Format = "dd/MM/yyyy";
    dataGridView1.Columns[4].Width = 80;
    dataGridView1.Update();
}

Why formatting doesn't work? DefaultCellStyle.Format is set:

回答1:

Make sure that the column index is [4] or [5]. You can check it from designer also.

Also make sure that the column is of DateTime type then only it will be get formatted.

回答2:

If your getting this from the database, its getting the format from your table.

回答3:

it may be the slash/backslash issue. Try this:

dataGridView1.Columns[4].DefaultCellStyle.Format = "dd\\/MM\\/yyyy";

or

dataGridView1.Columns[4].DefaultCellStyle.Format = @"dd\/MM\/yyyy";

回答4:

just in case if someone is looking for the answer to this question...

dataGridView1.Columns[4].DefaultCellStyle.Format = "dd'/'MM'/'yyyy";

all you have to do is add single quotations before and after the slash like this '/'

来源：https://stackoverflow.com/questions/17270212/datagridview-column-format