winform分页控件 附源码下载

以前都是从事B/S开发，由于公司有个比较大的C/S项目，在使用DATAGRIDVIEW的时候，显示数据量比较大，所以才用分页模式，也不知道这样是否正确。 

想找个C/S下面的分页控件，都没有什么好的，就自己跟B/S下的分页控件，修改成WINFORM下面的。 

首先创建一个用户控件名称为pager,在控件中拖入bindingNavigator和bindingSource，修改bindingNavigator，加入必要的一些控件。 

效果如下：

代码实现如下：

namespace WindowsApp.MyControl
{
  /**//// <summary>
  /// 申明委托
  /// </summary>
  /// <param name="e"></param>
  /// <returns></returns>
  public delegate int EventPagingHandler(EventPagingArg e);
  /**//// <summary>
  /// 分页控件呈现
  /// </summary>
  public partial class Pager : UserControl
  {
    public Pager()
    {
      InitializeComponent();
    }
    public event EventPagingHandler EventPaging;
    /**//// <summary>
    /// 每页显示记录数
    /// </summary>
    private int _pageSize = 20;
    /**//// <summary>
    /// 每页显示记录数
    /// </summary>
    public int PageSize
    {
      get { return _pageSize; }
      set
      {
        _pageSize = value;
        GetPageCount();
      }
    }

    private int _nMax = 0;
    /**//// <summary>
    /// 总记录数
    /// </summary>
    public int NMax
    {
      get { return _nMax; }
      set
      {
        _nMax = value;
        GetPageCount();
      }
    }

    private int _pageCount = 0;
    /**//// <summary>
    /// 页数=总记录数/每页显示记录数
    /// </summary>
    public int PageCount
    {
      get { return _pageCount; }
      set { _pageCount = value; }
    }

    private int _pageCurrent = 0;
    /**//// <summary>
    /// 当前页号
    /// </summary>
    public int PageCurrent
    {
      get { return _pageCurrent; }
      set { _pageCurrent = value; }
    }


    private void GetPageCount()
    {
      if (this.NMax > 0)
      {
        this.PageCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(this.NMax) / Convert.ToDouble(this.PageSize)));
      }
      else
      {
        this.PageCount = 0;
      }
    }

    /**//// <summary>
    /// 翻页控件数据绑定的方法
    /// </summary>
    public void Bind()
    {
      if (this.EventPaging != null)
      {
        this.NMax = this.EventPaging(new EventPagingArg(this.PageCurrent));
      }

      if (this.PageCurrent > this.PageCount)
      {
        this.PageCurrent = this.PageCount;
      }
      if (this.PageCount == 1)
      {
        this.PageCurrent = 1;
      }
      lblPageCount.Text = this.PageCount.ToString();
      this.lblMaxPage.Text = "共"+this.NMax.ToString()+"条记录";
      this.txtCurrentPage.Text = this.PageCurrent.ToString();

      if (this.PageCurrent == 1)
      {
        this.btnPrev.Enabled = false;
        this.btnFirst.Enabled = false;
      }
      else
      {
        btnPrev.Enabled = true;
        btnFirst.Enabled = true;
      }

      if (this.PageCurrent == this.PageCount)
      {
        this.btnLast.Enabled = false;
        this.btnNext.Enabled = false;
      }
      else
      {
        btnLast.Enabled = true;
        btnNext.Enabled = true;
      }

      if (this.NMax == 0)
      {
        btnNext.Enabled = false;
        btnLast.Enabled = false;
        btnFirst.Enabled = false;
        btnPrev.Enabled = false;
      }
    }

    private void btnFirst_Click(object sender, EventArgs e)
    {
      PageCurrent = 1;
      this.Bind();
    }

    private void btnPrev_Click(object sender, EventArgs e)
    {
      PageCurrent -= 1;
      if (PageCurrent <= 0)
      {
        PageCurrent = 1;
      }
      this.Bind();
    }

    private void btnNext_Click(object sender, EventArgs e)
    {
      this.PageCurrent += 1;
      if (PageCurrent > PageCount)
      {
        PageCurrent = PageCount;
      }
      this.Bind();
    }

    private void btnLast_Click(object sender, EventArgs e)
    {
      PageCurrent = PageCount;
      this.Bind();
    }

    private void btnGo_Click(object sender, EventArgs e)
    {
      if (this.txtCurrentPage.Text != null && txtCurrentPage.Text != "")
      {
        if (Int32.TryParse(txtCurrentPage.Text, out _pageCurrent))
        {
          this.Bind();
        }
        else
        {
          Common.MessageProcess.ShowError("输入数字格式错误！");
        }
      }
    }

  }
  /**//// <summary>
  /// 自定义事件数据基类
  /// </summary>
  public class EventPagingArg : EventArgs
  {
    private int _intPageIndex;
    public EventPagingArg(int PageIndex)
    {
      _intPageIndex = PageIndex;
    }
  }
}

								 
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