[英]Can't change DataGridViewComboBox value
我有一个从LINQ查询填充的DataGridView。 列之一是FK,所以我添加了一个ComboBox列来显示此字段,该字段显示得很好。
我遇到的问题是,它不会让我更改ComboBox的值,因为它的作用就像被锁定了一样。 我已经检查了DGV和Column的ReadOnly属性,并且都为false。
谁能阐明我所缺少的东西吗?
填充DGV的代码如下:
private void PopulateForm()
{
DBDataContext db = new DBDataContext();
var eventTypes =
from evt in db.EVENT_TYPEs
.Where(a => a.Omit == false)
.OrderBy(a => a.EventType)
select new
{
EventTypeID = evt.EventTypeID,
EventType = evt.EventType,
UpdateToStatusID = evt.UpdateToStatusID,
AttachmentAllowedYn = evt.AttachmentAllowedYn,
AttachmentRequiredYn = evt.AttachmentRequiredYn,
CommentRequiredYn = evt.CommentRequiredYn
};
var statuses =
from sts in db.STATUS
.Where(a => a.Omit == false)
select new
{
StatusID = sts.StatusID,
Status = sts.TechreqStatus
};
DataGridView dgv = this.dgvEventTypes;
DataGridViewColumn col;
dgv.AutoGenerateColumns = false;
col = dgv.Columns[dgv.Columns.Add("EventTypeID", "EventTypeID")];
col.DataPropertyName = "EventTypeID";
col = dgv.Columns[dgv.Columns.Add("EventType", "Event Type")];
col.DataPropertyName = "EventType";
DataGridViewComboBoxColumn comboCol = new DataGridViewComboBoxColumn();
comboCol.Name = "UpdateToStatusID";
comboCol.HeaderText = "Update To Status";
comboCol.DataPropertyName = "UpdateToStatusID";
comboCol.DataSource = statuses;
comboCol.ValueMember = "StatusID";
comboCol.DisplayMember = "Status";
dgv.Columns.Add(comboCol);
col = dgv.Columns[dgv.Columns.Add("AttachmentAllowedYn", "Attachments Allowed Yn")];
col.DataPropertyName = "AttachmentAllowedYn";
col = dgv.Columns[dgv.Columns.Add("AttachmentRequiredYn", "Attachment Required Yn")];
col.DataPropertyName = "AttachmentRequiredYn";
col = dgv.Columns[dgv.Columns.Add("CommentRequiredYn", "Comment Required Yn")];
col.DataPropertyName = "CommentRequiredYn";
dgv.DataSource = eventTypes;
db.Dispose();
}
非常感谢
我相信这是因为您使用的是匿名类型。 您可以使用原始类型(evt和sts的类型)
var eventTypes = from evt in db.EVENT_TYPEs where !evt.Omit order by evt.EventType
select evt
var statuses = from sts in db.STATUS where !sts.Omit
select sts
要么
创建一个POCO对象作为视图模型
var eventTypes = from evt in db.EVENT_TYPEs where !evt.Omit order by evt.EventType
select new EventTypesObject() {EventTypeID = evt.EventTypeID, ...}
var statuses = from sts in db.STATUS where !sts.Omit
select new StatusObject() {StatusID = sts.StatusID, Status = sts.TechreqStatus}
如果需要双向绑定,这将使实现INotifyPropertyChanging和INotifyPropertyChanged更容易。
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