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

Question

我有一个表支付,它有一个名为payMonth的可归零整数列.我有以下课程和清单:

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);

这个问题来了.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null.

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16位整数 - Int16在.Net中输入.
所以,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; }
}

最常见数据类型映射的列表