Question

我正在尝试从我的数据库中搜索购买，从“PurchaseTable”表中搜索并在DataGrid中显示结果，我知道如何使用Windows窗体执行此操作：

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
    }

但是我不知道如何用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
    }

我有这些名称空间：

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;

我用这段代码解决了我的问题：

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

更改

PurchaseResults.DataContext = dt;

到

PurchaseResults.ItemsSource = dt;

Answer 2

您是否在数据网格中定义了列。如果不是，当您将AutoGenerateColumns属性设置为true时，WPF可以自动为您生成它。

PurchaseResults.AutoGenerateColumns = true;
PurchaseResults.ItemsSource = dt;

Answer 3

当您使用代码时，您应该提供DataGrid的ItemSouce，但在处理Binding与MVVM架构时，则使用DataContext。

所以替换

PurchaseResults.DataContext = dt;

到

PurchaseResults.ItemsSource = dt;

Answer 4

你可以尝试

PurchaseResults.ItemsSource = dt.AsDataView();

如何使用WPF搜索数据库并在DataGrid中显示结果

4 个答案: