如何在DataGridView中格式化带有max和min的数字十进制的列？

Question

我想格式化DataGridView中显示和捕获的小数位,我有一个最小小数位数和最大小数位数.例如:

If caught, "120.0" display "120.00"
If caught "120.01" display "120.01"
If caught "120,123" display "120,123"
If caught "120.1234" display "120.1234"
If caught "120.12348" display "120.1235" (round)

在DataGridView列中,"txtcDecimal"具有属性(来自设计者)

txtcDecimal.DefaultCellStyle.Format = "N2";

txtcDecimal.DefaultCellStyle.Format = "0.00##";  // IS ANSWER. I do not work for an event that interfered

掩码"0.00 ##"作为"n2"工作只得到2位小数,它正确舍入到两位小数但只是不喜欢我需要的东西(如我在示例中所示)

如何在不消耗大量资源的情况下以简单的方式完成这项工作？

谢谢harlam357和Tom Garske

Answer 1

要格式化2到4位小数,可以使用自定义格式字符串.

txtcDecimal.DefaultCellStyle.Format = "0.00##"

再往前走......

public partial class Form1
{
   public Form1()
   {
      InitializeComponent();

      var list = new List<Data>();
      list.Add(new Data { Prop1 = 1, Prop2 = 1.2 });
      list.Add(new Data { Prop1 = 2, Prop2 = 1.234567 });

      dataGridView1.Columns.Add("Prop1", "Prop1");
      dataGridView1.Columns["Prop1"].DataPropertyName = "Prop1";
      dataGridView1.Columns.Add("Prop2", "Prop2");
      dataGridView1.Columns["Prop2"].DataPropertyName = "Prop2";
      dataGridView1.Columns["Prop2"].DefaultCellStyle.Format = "0.00##";
      dataGridView1.DataSource = list;
   }

   class Data
   {
      public int Prop1 { get; set; }
      public double Prop2 { get; set; }
   }
}