如何在WPF MVVM中向文本框显示数据库值？ [英] How to display database value to a textbox in WPF MVVM?

问题描述

我有一个需要与数据库值绑定的文本框

就像，我有一个文本框，一个组合框和一个按钮.Mr X从组合框中选择一个值（比如Employee No）点击按钮。根据价值（比如员工编号），相关名称应填写文本框。如何实现？



我尝试过：

I have a textbox which need to bind with database value
Like,i have a text box a combo box and a button.Mr X selects a value(say Employee No) from combo box and click the button.Based on the value(say Employee No) the associated name should fill in the text box.How can i achieve?

What I have tried:

<TextBox Template="{StaticResource TextBoxBaseControlTemplate}" x:Name="txttitle1" HorizontalAlignment="Left" Height="30" Margin="578,22,0,0" TextWrapping="Wrap" Text="{Binding PODetail.PO_TITLE1,Mode=TwoWay}" VerticalAlignment="Top" Width="152"/>

Below is the get/set of my model class

    public PurchaseOrderModel podetail = new PurchaseOrderModel();
        public PurchaseOrderModel PODetail
        {
            get { return podetail; }
            set { podetail = value; OnPropertyChanged("PODetail"); }
        } 
       
  PODetail.PO_TITLE1 = pom.PO_TITLE1;-->In this the value sets to text box in viewmodel but not reflecting to View

推荐答案

我相信您的问题是在绑定后设置PO_TITLE1的值并设置了类PODetail。您必须在PurchaseOrderModel类中实现INotifyPropertyChanged，并在PO_TITLE1值更改时触发PropertyChanged事件。

I believe your problem is that you set the value of PO_TITLE1 after the binding and the class PODetail has been set. You will have to implement the INotifyPropertyChanged in the PurchaseOrderModel class and trigger the PropertyChanged Event when the PO_TITLE1 value is changed.

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