在gridview c#中获取CheckedListBoxItem devexpress的值

Question

我在 grivviewDevexpress 中放了一个 CheckedListBoxItem，你可以在这里看到 :

如您所见，我在 page_load 中初始化了数据源：

 List<User> confirms = _userRepository.Get().ToList();
            ConfirmList.DataSource = confirms;
            ConfirmList.DisplayMember = "FullName";
            ConfirmList.ValueMember = "Id";

在保存按钮中，我需要获取用户选择的值（多个选择），但它 returns 为空，为什么？

 private void btnSave_ItemClick_1(object sender, ItemClickEventArgs e)
 {
     gridView.CloseEditor();
     Convert.ToDateTime(gridView.GetRowCellValue(rowHandle, "ReturnDateTime"));
     CheckedListBoxItem confirms =(CheckedListBoxItem)(gridView.GetRowCellValue(rowHandle, "Confirm"));
 }

Answer 1

我认为铸造类型是问题所在。

Answer 2

正如我怀疑您正在将 gridView.GetRowCellValue(rowHandle, "Confirm") 返回值转换为无效类型的代码。使用 as 运算符更改下面的代码行。

CheckedListBoxItem confirms =(CheckedListBoxItem)(gridView.GetRowCellValue(rowHandle, "Confirm"));

到

CheckedListBoxItem confirms = gridView.GetRowCellValue(rowHandle, "Confirm") as CheckedListBoxItem;
if(confirms != null){}

完成之后你就知道调试的结果是什么了。

正如我所见，编辑器附在 Confirm 列上，那么您将从 gridView.GetRowCellValue() 得到的结果是 Id 属性 [=18] 的值=] class 不是 CheckedListBoxItem.

当您调用 gridView.CloseEditor(); 时，编辑器将不存在以获取 CheckedListBoxItem。您可以在 ColumnView.ShownEditor Event 上访问编辑器。请参阅以下代码片段：

private void MainForm_Load(object sender, EventArgs e) {
    this.PhonesSource.DataSource = DataContext.GetPhones();
    this.CountriesSource.DataSource = DataContext.GetCountries();
    this.CitiesSource.DataSource = DataContext.GetAllCities();
}

private void GridView_ShownEditor(object sender, EventArgs e) {
    ColumnView view = (ColumnView)sender;
    if (view.FocusedColumn.FieldName == "CityCode") {
        LookUpEdit editor = (LookUpEdit)view.ActiveEditor;
        string countryCode = Convert.ToString(view.GetFocusedRowCellValue("CountryCode"));
        editor.Properties.DataSource = DataContext.GetCitiesByCountryCode(countryCode);
    }
}

// In certain scenarios you may want to clear the secondary editor's value
// You can use the RepositoryItem.EditValueChanged event for this purpose
private void CountryEditor_EditValueChanged(object sender, EventArgs e) {
    this.GridView.PostEditor();
    this.GridView.SetFocusedRowCellValue("CityCode", null);
}


    private void MainForm_Load(object sender, EventArgs e) {
        this.PhonesSource.DataSource = DataContext.GetPhones();
        this.CountriesSource.DataSource = DataContext.GetCountries();
        this.CitiesSource.DataSource = DataContext.GetAllCities();
    }

    private void GridView_ShownEditor(object sender, EventArgs e) {
        ColumnView view = (ColumnView)sender;
        if (view.FocusedColumn.FieldName == "CityCode") {
            LookUpEdit editor = (LookUpEdit)view.ActiveEditor;
            string countryCode = Convert.ToString(view.GetFocusedRowCellValue("CountryCode"));
            editor.Properties.DataSource = DataContext.GetCitiesByCountryCode(countryCode);
        }
    }

希望对您有所帮助..

在gridview c#中获取CheckedListBoxItem devexpress的值

Get the value of CheckedListBoxItem devexpress in gridview c#

c#

gridview

devexpress