将数据加载到CollectionViewSource [英] Load data to CollectionViewSource

问题描述

大家好，

我尝试使用下面的代码将数据加载到CollectionViewSource.但是它将引发异常.如何解决此问题?

Hi All,

I''ve try to load data to CollectionViewSource using below code.But it will throw exception.How can I solve this problem?

_CollectionViewSource = (CollectionViewSource)this.FindResource("EmpAttendanceViewSource");
            if (dtp_Date.SelectedDate != null)
            {
                var obj = from ea in db.EmployeeAttendances
                          join emp in db.Employees
                          on ea.EmployeeId equals emp.EmployeeId
                          where ea.InDate == dtp_Date.SelectedDate
                          select new { emp.EmployeeFirstName, ea.InTime, ea.OutTime, ea.NoOfHours };
                _CollectionViewSource.Source = (CollectionViewSource)obj;

例外是，
{"TwoWay或OneWayToSource绑定不适用于类型为''<> f__AnonymousType21`4 [System.String，System.DateTime，System.Nullable`1 [System.DateTime] ，System.Nullable`1 [System.Double]]''."

请帮帮我.
谢谢，
Chamara

Exception Is,
{"A TwoWay or OneWayToSource binding cannot work on the read-only property ''InTime'' of type ''<>f__AnonymousType21`4[System.String,System.DateTime,System.Nullable`1[System.DateTime],System.Nullable`1[System.Double]]''."

Please help me.
Thanks,
Chamara

推荐答案

没有WPF UI代码很难猜测，但是您应该能够将BindingMode设置为OneWay.如果"InTime"属性设置为TextBox

It''s hard to guess without WPF UI code, but you should be able to set the BindingMode to OneWay. In case ''InTime'' property is set to TextBox

<textbox text="{Binding Path=InTime, Mode=OneWay}" />

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