WPF DataGrid分页功能实现代码 修改原作者不能实现的部分

这两天需要给Datagrid加个分页，查找了一些相关的文章，发现有一个写了一个控件比较好，地址是 http://blog.csdn.net/zdw_wym/article/details/8221894
感谢这位大神12年的帖子，但是照着做了以后，发现除了点击数字和GO按钮好使意外，神马“首页、上一页、下一页、末页”都不好使。

继续找寻相关的资料和查看大神的源码，发现有的地方写的不对，因为textblock没有click事件，而大神写了click事件，所以没有得到触发，介于这个问题，我稍作了修改。

即给textblock添加里MouseLeftButtonUp事件，操作得以实现。

下面贴出全部源码，有需要的，可以使用

翻页控件xml文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Text.RegularExpressions;

namespace ImgProWPF
{
/// <summary>
/// Paging.xaml 的交互逻辑
/// </summary>
public partial class Paging : UserControl
{
public Paging()
{
InitializeComponent();

}

#region 参数
private DataTable _dt = new DataTable();
//每页显示多少条
private int pageNum = 10;
//当前是第几页
private int pIndex = 1;
//对象
private DataGrid grdList;
//最大页数
private int MaxIndex = 1;
//一共多少条
private int allNum = 0;
#endregion

#region 初始化数据
public void ShowPages(DataGrid grd, DataTable ds, int Num)
{
if (ds == null || ds.Rows.Count == 0)
return;
if (ds.Rows.Count == 0)
return;
DataTable dt = ds;
this._dt = dt.Clone();
this.grdList = grd;
this.pageNum = Num;
this.pIndex = 1;
foreach (DataRow r in dt.Rows)
this._dt.ImportRow(r);
SetMaxIndex();
ReadDataTable();
if(this.MaxIndex>1)
{
this.pageGo.IsReadOnly = false;
this.btnGo.IsEnabled = true;
}
}
#endregion

#region 画数据
private void ReadDataTable()
{
try
{
DataTable tmpTable = new DataTable();
tmpTable = this._dt.Clone();
int first = this.pageNum * (this.pIndex - 1);
first = (first > 0) ? first : 0;
//如果总数量大于每页显示数量
if (this._dt.Rows.Count >= this.pageNum * this.pIndex)
{
for (int i = first; i < pageNum * this.pIndex; i++)
{
tmpTable.ImportRow(this._dt.Rows[i]);
}
}
else
{
for (int i = first; i < this._dt.Rows.Count; i++)
{
tmpTable.ImportRow(this._dt.Rows[i]);
}
}
this.grdList.ItemsSource = tmpTable.DefaultView;
tmpTable.Dispose();
}
catch
{
MessageBox.Show("错误");
}
finally
{
DisplayPagingInfo();
}
}
#endregion

#region 画每页显示的数据
private void DisplayPagingInfo()
{
if (this.pIndex == 1)
{
this.btnPrev.IsEnabled = false;
this.btnFirst.IsEnabled = false;
}
else
{
this.btnPrev.IsEnabled = true;
this.btnFirst.IsEnabled = true;
}
if (this.pIndex == this.MaxIndex)
{
this.btnNext.IsEnabled = false;
this.btnLast.IsEnabled = false;
}
else
{
this.btnNext.IsEnabled = true;
this.btnLast.IsEnabled = true;
}
this.tbkRecords.Text = string.Format("每页{0}条/共{1}条", this.pageNum, this.allNum);
int first = (this.pIndex - 4) > 0 ? (this.pIndex - 4) : 1;
int last = (first + 9) > this.MaxIndex ? this.MaxIndex : (first + 9);
this.grid.Children.Clear();
for (int i = first; i <= last; i++)
{
ColumnDefinition cdf = new ColumnDefinition();
this.grid.ColumnDefinitions.Add(cdf);
TextBlock tbl = new TextBlock();
tbl.Text = i.ToString();
tbl.Style = FindResource("PageTextBlock3") as Style;
tbl.MouseLeftButtonUp += new MouseButtonEventHandler(tbl_MouseLeftButtonUp);
tbl.MouseLeftButtonDown += new MouseButtonEventHandler(tbl_MouseLeftButtonDown);
if (i == this.pIndex)
tbl.IsEnabled = false;
Grid.SetColumn(tbl, this.grid.ColumnDefinitions.Count - 1);
Grid.SetRow(tbl, 0);
this.grid.Children.Add(tbl);
}
}
#endregion

#region 首页
/// <summary>
/// 首页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnFirst_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.pIndex = 1;
ReadDataTable();
}
private void btnFirst_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
#endregion

#region 上一页
/// <summary>
/// 上一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnPrev_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (this.pIndex <= 1)
return;
this.pIndex--;
ReadDataTable();
}
private void btnPrev_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
#endregion

#region 下一页
/// <summary>
/// 下一页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnNext_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (this.pIndex >= this.MaxIndex)
return;
this.pIndex++;
ReadDataTable();
}

private void btnNext_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
#endregion

#region 末页
/// <summary>
/// 末页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnLast_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.pIndex = this.MaxIndex;
ReadDataTable();
}
private void btnLast_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
#endregion

#region 设置最多页面
/// <summary>
/// 设置最多页面
/// </summary>
private void SetMaxIndex()
{
//多少页
int Pages = this._dt.Rows.Count / pageNum;
if (this._dt.Rows.Count != (Pages * pageNum))
{
if (_dt.Rows.Count < (Pages * pageNum))
Pages--;
else
Pages++;
}
this.MaxIndex = Pages;
this.allNum = this._dt.Rows.Count;
}
#endregion

#region 跳转到多少页
/// <summary>
/// 跳转到多少页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnGo_Click(object sender, RoutedEventArgs e)
{
if(IsNumber(this.pageGo.Text))
{
int pageNum = int.Parse(this.pageGo.Text);
if(pageNum>0&&pageNum<=this.MaxIndex)
{
this.pIndex = pageNum;
ReadDataTable();
}
else if(pageNum>this.MaxIndex)
{
this.pIndex = this.MaxIndex;
ReadDataTable();
}
}
this.pageGo.Text = "";
}
#endregion

#region 分页数字的点击触发事件
private void tbl_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
TextBlock tbl = sender as TextBlock;
if (tbl == null)
return;
int index = int.Parse(tbl.Text.ToString());
this.pIndex = index;
if (index > this.MaxIndex)
this.pIndex = this.MaxIndex;
if (index < 1)
this.pIndex = 1;
ReadDataTable();
}

private void tbl_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
#endregion

private static Regex RegNumber = new Regex("^[0-9]+$");

#region 判断是否是数字
public static bool IsNumber(string valString)
{
Match m = RegNumber.Match(valString);
return m.Success;
}
#endregion
}
}

Paging.xaml.cs
主页调用xml文件

<local:Paging x:Name="GridPaging"/>

主页调用.cs文件

public void Band()
{
DBConfig DB = new DBConfig();
ds = DB.SearchAll(txtSearch.Text);
DGInformation.ItemsSource = null;
DGInformation.ItemsSource = ds.Tables[0].DefaultView;//Datagrid数据绑定
GridPaging.ShowPages(this.DGInformation, ds.Tables[0], 20);//分页部分
}

效果图展示





不知道是数据源里包含图片的原因还是什么原因，在翻页的时候，会很慢，等很长时间才能翻页，这个问题，不知道是控件引起的，还是我绑定数据引起的，等解决了，我会在本帖说明。

还有一点就是，我启用了WPF里的datagrid的序号，不过这个不像WEB里的分页以后序号是连贯的，这个是重新分配，这个也是一个需要解决的问题。

实验证明，翻页缓慢是由使用datagrid自身的排序导致的，因此，采用SQL直接查询序号，同原有数据一同绑定到datagrid，问题解决。