C＃绑定datagridviewcomboboxcolumn列出显示，格式化，首选大小错误

Question

我有一个表付款，其中包含一个名为payMonth的可归零整数列。我有以下课程和列表：

public class months
{
     public int payMonth { get; set; }
     public string monthName { get; set; }
}

lstMonths = new List<months> {
   ,new months() { payMonth = 1, monthName = "jan" }
   ,new months() { payMonth = 2, monthName = "feb" }
   ,new months() { payMonth = 3, monthName = "mar" }
   ,new months() { payMonth = 4, monthName = "apr" }
   ,new months() { payMonth = 5, monthName = "may" }
   ,new months() { payMonth = 6, monthName = "jun" }
   ,new months() { payMonth = 7, monthName = "jul" }
   ,new months() { payMonth = 8, monthName = "aug" }
   ,new months() { payMonth = 9, monthName = "sep" }
   ,new months() { payMonth = 10, monthName = "oct" }
   ,new months() { payMonth = 11, monthName = "nov" }
   ,new months() { payMonth = 12, monthName = "dec" }};

cmbMonth = new DataGridViewComboBoxColumn();
cmbMonth.DataSource = lstMonths;
cmbMonth.ValueMember = "payMonth";
cmbMonth.DisplayMember = "monthName";
cmbMonth.DataPropertyName = "payMonth";
cmbMonth.Name = "cmbPayMonth";
cmbMonth.HeaderText = "Month";
cmbMonth.FlatStyle = FlatStyle.Flat;
cmbMonth.Width = 80;

dgvPayments.Columns.Insert(5, cmbMonth);

问题来了。当数据显示在dgv中时，DataGridViewComboBoxColumn cmbMonth显示数字值（1,2,3，...）而不是月份名称（'Jan'，'Feb'，'Mar'，...）。当我点击dgv它显示错误：格式化，显示和一些格式化，preferredSize。当我删除DataPropertyName属性时，会出现此错误但不显示数据。但是，表中的payMonth值仅在列表范围内或为空。

这是付款表：

怎么了？

Answer 1

更新后

  

payMonth列的数据库类型是Number：integer

MS Access类型Number: integer表示.Net中的16位整数 - Int16类型 因此，您应该将payMonth属性更改为short（Int16）

public class months
{
    public short payMonth { get; set; }
    public string monthName { get; set; }
}

List of the Most Common Data Type Mappings