c# - 如何使用 WPF 搜索数据库并将结果显示在 DataGrid 中

Question

我正在尝试从我的数据库中的“PurchaseTable”表中搜索购买并将结果显示在 DataGrid 中，我知道如何使用 Windows 窗体来完成此操作:

private void SearchButton_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        SqlDataAdapter SDA = new SqlDataAdapter("SELECT TitleOfRecord, DateOfPurchase FROM  PurchaseTable WHERE (NameOfCustomer = '"+NameOfCustomerSText.Text+"')", connection);
        //Query that will return the Title of the Records and Dates of purchases depending on the Customer which has been searched for
        SDA.Fill(dt);
        PurchaseResults.DataSource = dt;
        //Results will appear in the PurchaseResults DataGrid
    }

但我不知道如何用 WPF 做到这一点，到目前为止我有这个但它不起作用:

private void SearchCustomerButton_Click(object sender, RoutedEventArgs e)
    {
        DataTable dt = new DataTable();
        SqlDataAdapter SDA = new SqlDataAdapter("SELECT TitleOfRecord, DateOfPurchase FROM  PurchaseTable WHERE (NameOfCustomer = '" + NameOfCustomerSText.Text + "')", connection);
        //Query that will return the Title of the Records and Dates of purchases depending on the Customer which has been searched for
        SDA.Fill(dt);
        PurchaseResults.DataContext = dt;
        //Results will appear in the PurchaseResults DataGrid
    }

我有这些命名空间:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
using System.Data;

我用这段代码来解决我的问题:

private void SearchCustomerButton_Click(object sender, RoutedEventArgs e)
    {
        SqlDataAdapter da;
        DataSet ds;
        da = new SqlDataAdapter("SELECT TitleOfRecord, DateOfPurchase FROM  PurchaseTable WHERE (NameOfCustomer = '" + NameOfCustomerSText.Text + "')", connection);
        //Query that will return the Title of the Records and Dates of purchases depending on the Customer which has been searched for
        ds = new DataSet();
        da.Fill(ds);
        PurchaseResults.ItemsSource = ds.Tables[0].DefaultView;
        //Results will appear in the PurchaseResults DataGrid
    }

Answer 1

当您在后面使用代码时，您应该提供 DataGrid 的 ItemSouce，但是当处理与 MVVM 架构的绑定(bind)时，则使用 DataContext。

所以替换

PurchaseResults.DataContext = dt;

到

PurchaseResults.ItemsSource = dt;