WPF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 =string.Format("SELECT  * FROM [{0}] Where {1} like '%{2}%'  ORDER BY {3}",ViewName,SearchFieldName, searchText.Text.Trim(),ViewOrder);

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>