Question

我想改变DateTime对象在DataGridView中的显示方式。具体来说，我想在时间上显示秒数。

C＃ .net 2.0

Answer 1

dataGridView1.Columns[0].DefaultCellStyle.Format = "MM/dd/yyyy HH:mm:ss";

有关特定格式，请查看以下链接：

Answer 2

以下是3种不同方式的例子：

单元格模板上的格式字符串
单元格格式化事件
自定义类型转换器

有用吗？

using System;
using System.ComponentModel;
using System.Windows.Forms;
public class MyData
{
    public DateTime A { get; set; }
    public DateTime B { get; set; }
    public DateTime C { get; set; }
    [TypeConverter(typeof(CustomDateTimeConverter))]
    public DateTime D { get; set; }
}
class CustomDateTimeConverter : DateTimeConverter
{
    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
    {
        if (destinationType == typeof(string))
        {
            return ((DateTime)value).ToString("dd-MM-yyyy HH:mm:ss");
        }
        return base.ConvertTo(context, culture, value, destinationType);
    }
}
static class Program {
    [STAThread]
    static void Main()
    {
        DateTime when = DateTime.Now;
        var data = new BindingList<MyData>
        {
            new MyData { A = when, B = when, C = when }
        };
        using (var form = new Form())
        using (var grid = new DataGridView {
            AutoGenerateColumns = false,
            DataSource = data, Dock = DockStyle.Fill })
        {
            form.Controls.Add(grid);
            grid.Columns.Add(
                new DataGridViewTextBoxColumn {
                    HeaderText = "Vanilla",
                    AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells,
                    DataPropertyName = "A",
                });
            grid.Columns.Add(
                new DataGridViewTextBoxColumn {
                    HeaderText = "Format",
                    AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells,
                    DataPropertyName = "B",
                    DefaultCellStyle = { Format = "dd/MM/yyyy HH:mm:ss" }
                });
            grid.Columns.Add(
                new DataGridViewTextBoxColumn {
                    HeaderText = "CellFormatting",
                    AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells,
                    DataPropertyName = "C",
                });
            grid.CellFormatting += (sender, args) =>
            {
                if (args.Value != null && args.ColumnIndex == 2
                    && args.DesiredType == typeof(string))
                {
                    args.Value = ((DateTime)args.Value).ToString("dd MM yyyy HH:mm:ss");
                }
            };
            grid.Columns.Add(
                new DataGridViewTextBoxColumn {
                    HeaderText = "TypeConverter",
                    AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells,
                    DataPropertyName = "D",
                });
            Application.Run(form);
        }
    }

}

Answer 3

一种方法是处理CellFormattingEvent event，然后您可以按照您想要的方式显示数据。

Answer 4

您可以尝试在设计中编辑RowDefaultCellStyle-＆gt;格式并选择可接受的格式，或者使用：

DataGridViewCellStyle customStyle = new DataGridViewCellStyle();
customStyle.Format = "T";
customStyle.NullValue = null;
customGridView.RowsDefaultCellStyle = customStyle;

Answer 5

覆盖OnRowDataBound事件并阅读更多关于cultures and formatting in .Net

的信息

protected override void OnRowDataBound(GridViewRowEventArgs e)
{

    base.OnRowDataBound(e);


    if (e.Row.RowType == DataControlRowType.DataRow)
    {
      for (int i = 0; i < e.Row.Cells.Count; i++)
        {

                  TableCell cell = e.Row.Cells[i];
                  cell.Text = DateTime.Parse ( cell.Text, culture ); 
         }  
    }
    }

如何更改DateTime对象在DataGridView中的显示方式

5 个答案: