如何使用WPF搜索数据库并在DataGrid中显示结果

本文关键字：DataGrid 显示 结果 何使用 WPF 搜索 数据库 | 更新日期: 2023-09-27 18:10:47

我正试图从我的数据库中搜索购买，从'PurchaseTable'表并在DataGrid中显示结果，我知道如何使用Windows窗体:

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
    }

但是我不知道如何使用WPF，到目前为止我有这个，但它不工作:

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;

我用下面的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
    }

如何使用WPF搜索数据库并在DataGrid中显示结果

当你使用后面的代码时，你应该提供DataGrid的ItemSouce，但是当处理绑定与MVVM架构时，则使用DataContext。

替换

PurchaseResults.DataContext = dt;


PurchaseResults.ItemsSource = dt;

变化

PurchaseResults.DataContext = dt;


PurchaseResults.ItemsSource = dt;

您是否定义了数据网格中的列?如果没有，当您将autogenerateccolumns属性设置为true时，WPF可以自动为您生成它。

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

你可以试试

PurchaseResults.ItemsSource = dt.AsDataView();
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