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[英]C#: How to Display Binding Data with DataGridViewComboBoxColumn in DataGridView
[英]C# binding datagridviewcomboboxcolumn to list display, formatting, preferred Size error
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?
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 - .Net中的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; }
}
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