WPF 数据分页控件改进

本文介绍的是分页控件的改进，引用dukey's 的发布的控件 ，详细见原文： http://www.cnblogs.com/dukey/archive/2011/08/09/2132187.html

原文控件使用有两个问题：1，首次绑定的时候，不显示总页数和当前页数，需要点击一下按钮才显示，

2，控件中的"上一页"，“下一页”等按钮布局在不同宽度下显示不够友好，

效果如下图：

针对第一个问题，仔细看了原作者的源码，发现初次绑定的时候，没有给显示总记录数的lable赋值，

于是，在取得总记录数后就给显示记录的控件的Text属性赋值，改进后的代码如下所示，第8行后是我添加进来的，

        public int NMax
        {
            get { return _nMax; }
            set
            {
                _nMax = value;
                GetPageCount();
                lblinfo.Content = "" + NMax + "条 " + this.PageCurrent.ToString() + "/" + this.PageCount.ToString() + "";

                this.txtCurrentPage.Text = this.PageCurrent.ToString();
            }
        }

针对第2个问题，原文中采用的是Grid布局，

<Grid>
        <Label Content="" Height="28" HorizontalAlignment="Left" Margin="0,0,0,0" Name="lblinfo" VerticalAlignment="Center" />
        <Button Content="上一页" Height="23" HorizontalAlignment="Left" Margin="172,0,0,0" Name="btnPrev" VerticalAlignment="Center" Width="75" Click="btnPrev_Click" />
        <Button Content="下一页" Height="23" HorizontalAlignment="Right" Margin="0,0,272,0" Name="btnNext" VerticalAlignment="Center" Width="75"  Click="btnNext_Click"/>
        <TextBox Height="23" Margin="533,0,0,0" Name="txtCurrentPage" VerticalAlignment="Center" HorizontalAlignment="Left" Width="34" />
        <Button Content="转到" HorizontalAlignment="Right" Margin="0,0,96,0" Name="btnGo" Width="75" Height="23" Click="btnGo_Click" />
        <Label Content="页"  HorizontalAlignment="Left" Margin="573,0,0,0" Name="label2" VerticalAlignment="Center" />
        <Label Content="第"  Margin="0,0,68,0" Name="label3" VerticalAlignment="Center" HorizontalAlignment="Right"  />
        <Button Content="首页" Height="23" HorizontalAlignment="Left" Margin="91,0,0,0" Name="btnFirst" VerticalAlignment="Center" Width="75" Click="btnFirst_Click" />
        <Button Content="末页" Height="23" HorizontalAlignment="Left" Margin="334,0,0,0" Name="btnLast" VerticalAlignment="Center" Width="75" Click="btnLast_Click" />       
    </Grid>

改成StackPanel后的代码：

<StackPanel Orientation="Horizontal" Margin="0" Width="700">
                <Label Content="" Height="28"  Margin="10,0,0,0" Name="lblinfo" VerticalAlignment="Center" />
                <Button Content="首页" Height="23"  Margin="10,0" Name="btnFirst" VerticalAlignment="Center" Width="75" Click="btnFirst_Click" />
                <Button Content="上一页" Height="23"  Margin="10,0" Name="btnPrev" VerticalAlignment="Center" Width="75" Click="btnPrev_Click" />
                <Button Content="下一页" Height="23" Margin="10,0" Name="btnNext" VerticalAlignment="Center" Width="75"  Click="btnNext_Click"/>
                <Button Content="末页" Height="23" Margin="10,0" x:Name="btnLast" Width="75" Click="btnLast_Click" VerticalAlignment="Center" />



                <Label Content="第"  Margin="10,0,2,0" Name="label3"  VerticalAlignment="Center"   />
                <TextBox Height="23" Margin="2,0" Name="txtCurrentPage" VerticalAlignment="Center" Width="34" />
                <Label Content="页"   Margin="2,0" Name="label2"  />
                <Button Content="转到"  Margin="2,0,10,0" Name="btnGo" Width="75" Height="23" Click="btnGo_Click" />
            </StackPanel>

完....