Question

此代码中的chklstDepartment＆＃39;具有多个值但显示但仅是第一个选定项目的绑定数据。如何获取所有选定复选框列表值的数据？

List<LessonLearnDetails> objLessonDetails = objLessonDashboard.getLessonLearntDetails();
var searchData = objLessonDetails
    .Where(i => ddlAsset.SelectedValue == "0" ||
                i._Asset.AssetID == ddlAsset.SelectedValue)
    .Where(i => ddlAuditType.SelectedValue == "0" ||
                i._Audit.AuditTypeID == ddlAuditType.SelectedValue)
    .Where(i => chklstDepartment.SelectedValue == "0" ||
                i._Department.DepartmentID == chklstDepartment.SelectedValue)
    .Where(i => ddlStartYear.SelectedItem.Text == "--Select All--" ||
                i._Year.StartYear == ddlStartYear.SelectedItem.Text)
    .Where(i => ddlEndYear.SelectedItem.Text == "--Select All--" ||
                i._Year.EndYear == ddlEndYear.SelectedItem.Text)
    .Distinct()
    .ToList();
BindGrid(searchData);

我还使用了一个函数来存储已检查的值，并使用chklstDepartment.Contains（）传递该值，但它返回0。

for (int i = 0; i < chklstDepartment.Items.Count; i++)
{
    if (chklstDepartment.Items[i].Selected)
    {
        chbstr += chklstDepartment.Items[i].Value + ",";
        count++;
        //if(count > 1)
    }
    var data = new string[] {chbstr};
}
chbstr = chbstr == string.Empty ? "0" : chbstr;
//chbstr = chklstDepartment.SelectedValue;
//chbstr = chbstr.Split(',').ToString();
return chbstr;

Answer 1

你不应该返回一个字符串，而是一个可枚举的字符串。你可以改变你的where声明。

类似的东西：

.Where(i => (chklstDepartment.SelectedValue == "0")
         || (chklstDepartment.Items.Cast<ListItem>()
                                   .Where(item => item.Selected)
                                   .Select(item => item.Value)
                                   .Contains(i._Department.DepartmentID)))

如果DepartmentID是int，您可以尝试：

.Where(i => (chklstDepartment.SelectedValue == "0")
         || (chklstDepartment.Items.Cast<ListItem>()
                                   .Where(item => item.Selected)
                                   .Select(item => Convert.ToInt32(item.Value))
                                   .Contains(i._Department.DepartmentID)))

您可以考虑缓存选择：

var selectedIds = chklstDepartment.Items.Cast<ListItem>()
                                        .Where(item => item.Selected)
                                        .Select(item => Convert.ToInt32(item.Value))
                                        .ToArray(); // or ToList() or HashSet

.Where(i => (chklstDepartment.SelectedValue == "0")
         || (selectedIds.Contains(i._Department.DepartmentID)))

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1 个答案: