WPF中使用DataGridView创建报表控件

　　WPF中使用DataGridView创建报表控件

　　直入主题。报表数据是只作显示用的，直接用DataTable比生成ORM集合快，并且高灵活性。以后要修改报表，只要简单修改一下数据库中的视图。

　　但是WPF中的DataGrid对于数据稍多时，就会很慢。600行的数据显示要半分钟。通过断点查看，发现其实是DataTable绑定到DataGrid时耗时，数据返回到DataTable是很快的。看来要用以前的DataGridView了。用System.Windows.Forms.DataGridView修改后性能大大提高。600行的数据五，六秒。

　　报表控件的XAML

<UserControl x:Class="WpfApplication1.ReportControl" 

          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
             mc:Ignorable="d"  
             d:DesignHeight="300" d:DesignWidth="600"  
             xmlns:winform="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms">  

    <Grid  Background="DarkGray">  
        <Grid.RowDefinitions>  
            <RowDefinition Height="34"></RowDefinition>  
            <RowDefinition></RowDefinition>  
        </Grid.RowDefinitions>  

        <StackPanel Grid.Row="0" Orientation="Horizontal">  
            <TextBlock VerticalAlignment="Center" Text="{Binding SearchFieldTitle}"  Margin="5"></TextBlock>  
            <TextBox Name="searchText" Width="200"  Margin="5"></TextBox>  
            <Button Content="查找" Width="50" Margin="5" IsDefault="True" Click="Button_Click"></Button>  
        </StackPanel>  

        <WindowsFormsHost Grid.Row="1" Name="windowsFormsHost1" Background="LightGray" >  
            <winform:DataGridView Name="listDataGrid" ReadOnly="True" AllowDrop="True"  
                                  AllowUserToAddRows="False" AllowUserToDeleteRows="False"   
                                  Font="15" RowHeadersWidth="20" SelectionMode="FullRowSelect" 
                                  ShowEditingIcon="False" ShowCellToolTips="False" ShowCellErrors="False" 
                                  ShowRowErrors="False" AutoSizeColumnsMode="AllCells" >  
            </winform:DataGridView>  
        </WindowsFormsHost>  
    </Grid>  
</UserControl> 

　　报表控件的C#(ReportControl.xaml.cs)

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;  
using System.Windows.Forms;     

namespace WpfApplication1  

{  

    /// <summary>  
    /// BaseReport.xaml 的交互逻辑  
    /// </summary>  
    public partial class ReportControl : System.Windows.Controls.UserControl  

    {  

        private System.Windows.Forms.DataGridView listDataGrid;     

        public string ViewName { get; set; }  
        public string ViewOrder { get; set; }  
        public string SearchFieldName { get; set; }  
        public string SearchFieldTitle { get; set; }         

        public ReportControl()  
        {  
            InitializeComponent();  
            listDataGrid = windowsFormsHost1.Child as System.Windows.Forms.DataGridView;  

               this.SearchFieldTitle = "";  
            this.DataContext = this;  
        }  
  

        private void Button_Click(object sender, RoutedEventArgs e)  
        {  
            string queryStr = "SELECT  * FROM [@TableName] Where @SearchFieldName like '%@SearchFieldValue%'  ORDER BY @ViewOrder";  
            queryStr = queryStr.Replace("@TableName", ViewName);  
            queryStr = queryStr.Replace("@ViewOrder", ViewOrder);  
            queryStr = queryStr.Replace("@SearchFieldName", SearchFieldName);  
            queryStr = queryStr.Replace("@SearchFieldValue", searchText.Text.Trim());  
            listDataGrid.DataSource = DB.GetDataTable(queryStr);  
        }    
    }  
} 

DB辅助类

using System;  
using System.Collections.Generic;  
using System.Text;  
using System.Data.SqlClient;  
using System.Data;  
namespace WpfApplication1  
{  
    public class DB  
    {  
        private static  string connectionStr = "";  

        public static void InitConnectionStr(string conStr)  
        {  
            connectionStr = conStr;  
        }  

        public static SqlConnection  GetNewConnection()  
        {  
            return new SqlConnection(connectionStr);  
        }  

        public static DataTable GetDataTable(string selectCmdStr)  
        {  
            DataTable dt = new DataTable();  
           SqlDataAdapter adapter=null;  
            SqlConnection conn=null;  
            try 
            {  
                conn=GetNewConnection();  
                conn.Open();  
                adapter = new SqlDataAdapter(selectCmdStr, conn);  
                adapter.Fill(dt);  
            }  
            catch 
            {  
            }  
            finally 
            {  
                if (conn != null)  
                {  
                    conn.Close();  
                    conn.Dispose();  
                }  

                if (adapter != null)  
                {  
                    adapter.Dispose();  
                }  
            }  

               return dt;  

        }  

    }  

} 

　　调用

　　1。初始化连接字符串。

　　DB.InitConnectionStr(@"Data Source=PC2011012718UQF\SQLEXPRESS;Initial Catalog=Northwind;Persist Security Info=True;User ID=dbReader;Password=888888");

　　2。在要用的XAML中使用ReportControl

<Window x:Class="WpfApplication1.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        Title="MainWindow" Height="350" Width="525" xmlns:my="clr-namespace:WpfApplication1">  
    <Grid>

        <my:ReportControl x:Name="reportControl1"  
                          ViewName="Alphabetical list of products" ViewOrder="ProductID" 
                          SearchFieldName="ProductName" SearchFieldTitle="Product Name:" />  

    </Grid>  
</Window> 

　　

本文来自Ivan83的博客，原文地址:http://www.cnblogs.com/Ivan83/archive/2011/08/04/2127860.html