Controllo di pagina winform con download del codice sorgente

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。　

想找一个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，命名为pager，在控件中拖入bindingNavigator和bindingSource，修改bindingNavigator，添加必要的一些控件。　

效果如下：

代码实现如下：

namespace WindowsApp.MyControl
{
  /**//// <summary>
  /// 声明委托
  /// </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>
    /// Numero totale di record
    /// </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>
    /// 当前页码
    /// </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>
    /// 方法用于绑定翻页控件数据
    /// </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("Formato di numero di input errato!");
        }
      }
    }
  }
  /**//// <summary>
  /// Classe base per dati eventi personalizzati
  /// </summary>
  public class EventPagingArg : EventArgs
  {
    private int _intPageIndex;
    public EventPagingArg(int PageIndex)
    {
      _intPageIndex = PageIndex;
    }
  }
}

La funzione del controllo è stata implementata基本上。　

Come bindevi i dati?　

Paginazione a grande volume, utilizzo della procedura di archiviazione.　

Questa procedura di archiviazione è presa da Internet, oh oh. Lo ho messo qui, spero che l'autore originale non mi getti pietre.

ALTER  PROCEDURE SP_Pagination
/**/*
***************************************************************
** Procedura di archiviazione di paginazione a livello di milioni **
***************************************************************
Spiegazione dei parametri:
1.Tables : Nome della tabella, vista
2.PrimaryKey : Chiave primaria
3.Sort : Statement di ordinamento, senza Order By Ad esempio: NewsID Desc,OrderRows Asc
4.CurrentPage : Numero di pagina corrente
5.PageSize : Dimensione della pagina di elenco
6.Filter : Statement di filtraggio, senza Where 
7.Group : Statement Group, senza Group By
Esempio di effetto: http://www.cn5135.com/_App/Enterprise/QueryResult.aspx
***************************************************************/
(
@Tables varchar(2000),
@PrimaryKey varchar(500),
@Sort varchar(500) = NULL,
@CurrentPage int = 1,
@PageSize int = 10,
@Fields varchar(2000) = '*',
@Filter varchar(1000) = NULL,
@Group varchar(1000) = NULL
)
AS
/**/* Ordinamento predefinito */
IF @Sort IS NULL OR @Sort = ''
SET @Sort = @PrimaryKey
DECLARE @SortTable varchar(1000)
DECLARE @SortName varchar(1000)
DECLARE @strSortColumn varchar(1000)
DECLARE @operator char(2)
DECLARE @type varchar(1000)
DECLARE @prec int
/**/* Impostare la dichiarazione di ordinamento. */
IF CHARINDEX('DESC',@Sort)>0
BEGIN
SET @strSortColumn = REPLACE(@Sort, 'DESC', '')
SET @operator = '<='
END
ELSE
BEGIN
IF CHARINDEX('ASC', @Sort) = 0
SET @strSortColumn = REPLACE(@Sort, 'ASC', '')
SET @operator = '>='
END
IF CHARINDEX('.', @strSortColumn) > 0
BEGIN
SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn))
SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn))
END
ELSE
BEGIN
SET @SortTable = @Tables
SET @SortName = @strSortColumn
END
SELECT @type=t.name, @prec=c.prec
FROM sysobjects o 
JOIN syscolumns c on o.id=c.id
JOIN systypes t on c.xusertype=t.xusertype
WHERE o.name = @SortTable AND c.name = @SortName
IF CHARINDEX('char', @type) > 0
SET @type = @type + '(' + CAST(@prec AS varchar) + ')'
DECLARE @strPageSize varchar(500)
DECLARE @strStartRow varchar(500)
DECLARE @strFilter varchar(1000)
DECLARE @strSimpleFilter varchar(1000)
DECLARE @strGroup varchar(1000)
/**/* 默认当前页 */
IF @CurrentPage < 1
SET @CurrentPage = 1
/**/* 设置分页参数. */
SET @strPageSize = CAST(@PageSize AS varchar(500))
SET @strStartRow = CAST(((@CurrentPage - 1)*@PageSize + 1) AS varchar(500))
/**/*筛选以及分组语句.*/
IF @Filter IS NOT NULL AND @Filter != ''
BEGIN
SET @strFilter = ' WHERE ' + @Filter + ' '
SET @strSimpleFilter = ' AND ' + @Filter + ' '
END
ELSE
BEGIN
SET @strSimpleFilter = ''
SET @strFilter = ''
END
IF @Group IS NOT NULL AND @Group != ''
SET @strGroup = ' GROUP BY ' + @Group + ' '
ELSE
SET @strGroup = ''
/**/*执行查询语句*/
EXEC(
'
DECLARE @SortColumn ' + @type + '
SET ROWCOUNT ' + @strStartRow + '
SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
SET ROWCOUNT ' + @strPageSize + '
SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
'
)

使用该存储过陈，得到数据，将数据绑定到数据控件，提供了一个pageData类　

/**//// <summary>
  /// 数据源提供
  /// </summary>
  public class PageData
  {
    private int _PageSize = 10;
    private int _PageIndex = 1;
    private int _PageCount = 0;
    private int _TotalCount = 0;
    private string _TableName;//Nome della tabella
    private string _QueryFieldName = "*";//Campo della tabella FieldStr
    private string _OrderStr = string.Empty; //Campo di ordinamento _SortStr
    private string _QueryCondition = string.Empty;//Condizione di ricerca RowFilter
    private string _PrimaryKey = string.Empty;//Chiave primaria
    /**//// <summary>
    /// Numero di pagine visualizzate
    /// </summary>
    public int PageSize
    {
      get
      {
        return _PageSize;
      }
      set
      {
        _PageSize = value;
      }
    }
    /**//// <summary>
    /// Pagina corrente
    /// </summary>
    public int PageIndex
    {
      get
      {
        return _PageIndex;
      }
      set
      {
        _PageIndex = value;
      }
    }
    /**//// <summary>
    /// Numero totale di pagine
    /// </summary>
    public int PageCount
    {
      get
      {
        return _PageCount;
      }
    }
    /**//// <summary>
    /// Numero totale di record
    /// </summary>
    public int TotalCount
    {
      get
      {
        return _TotalCount;
      }
    }
    /**//// <summary>
    /// Nome della tabella, inclusi i viste
    /// </summary>
    public string TableName
    {
      get
      {
        return _TableName;
      }
      set
      {
        _TableName = value;
      }
    }
    /**//// <summary>
    /// Campo della tabella FieldStr
    /// </summary>
    public string QueryFieldName
    {
      get
      {
        return _QueryFieldName;
      }
      set
      {
        _QueryFieldName = value;
      }
    }
    /**//// <summary>
    /// Campo di ordinamento
    /// </summary>
    public string OrderStr
    {
      get
      {
        return _OrderStr;
      }
      set
      {
        _OrderStr = value;
      }
    }
    /**//// <summary>
    /// Condizione di ricerca
    /// </summary>
    public string QueryCondition
    {
      get
      {
        return _QueryCondition;
      }
      set
      {
        _QueryCondition = value;
      }
    }
    /**//// <summary>
    /// Chiave primaria
    /// </summary>
    public string PrimaryKey
    {
      get {}}
        return _PrimaryKey;
      }
      set {
        _PrimaryKey = value;
      }
    }
    public DataSet QueryDataTable()
    {
      SqlParameter[] parameters = {
          new SqlParameter("@Tables", SqlDbType.VarChar, 255),
          new SqlParameter("@PrimaryKey" , SqlDbType.VarChar , 255),  
          new SqlParameter("@Sort", SqlDbType.VarChar , 255 ),
          new SqlParameter("@CurrentPage", SqlDbType.Int),
          new SqlParameter("@PageSize", SqlDbType.Int),                  
          new SqlParameter("@Fields", SqlDbType.VarChar, 255),
          new SqlParameter("@Filter", SqlDbType.VarChar,1000),
          new SqlParameter("@Group", SqlDbType.VarChar, 1000 )
          };
      parameters[0].Value = _TableName;
      parameters[1].Value = _PrimaryKey;
      parameters[2].Value = _OrderStr;
      parameters[3].Value = PageIndex;
      parameters[4].Value = PageSize;
      parameters[5].Value =_QueryFieldName;
      parameters[6].Value = _QueryCondition;
      parameters[7].Value = string.Empty;
      DataSet ds = DbHelperSQL.RunProcedure("SP_Pagination", parameters, "dd");
      _TotalCount = GetTotalCount();
      if (_TotalCount == 0)
      {
        _PageIndex = 0;
        _PageCount = 0;
      }
      else
      {
        _PageCount = _TotalCount % _PageSize == 0 ? _TotalCount / _PageSize : _TotalCount / _PageSize + 1;
        if (_PageIndex > _PageCount)
        {
          _PageIndex = _PageCount;
          parameters[4].Value = _PageSize;
          ds = QueryDataTable();
        }
      }
      return ds;
    }
    public int GetTotalCount()
    {
      string strSql = " select count(1) from "+_TableName;
      if (_QueryCondition != string.Empty)
      {
        strSql +=" where " + _QueryCondition;
      }
      return int.Parse(DbHelperSQL.GetSingle(strSql).ToString());
    }
  }

Bene, metti un DATAGRIDVIEW nella pagina e trascina il controllo pager

private void ReceiveOrderJLForm_Load(object sender, EventArgs e)
    {
      this.pager1.PageCurrent = 1;
      this.pager1.Bind();
    }
    private int dgvBind()
    {
      WindowsApp.MyControl.PageData pageData = new WindowsApp.MyControl.PageData();
      pageData.TableName = "T_ReceiveOrder";
      pageData.PrimaryKey = "ReceiveOrderID";
      pageData.OrderStr = "ReceiveOrderID desc";
      pageData.PageIndex = this.pager1.PageCurrent;
      pageData.PageSize = this.pager1.PageSize;
      pageData.QueryCondition = _strSql + strWhere.ToString();
      pageData.QueryFieldName = "*";
      this.pager1.bindingSource.DataSource = pageData.QueryDataTable().Tables[0];
      this.pager1.bindingNavigator.BindingSource = pager1.bindingSource;
      dgvReceiveOrder.AutoGenerateColumns = false;
      dgvReceiveOrder.DataSource = this.pager1.bindingNavigator.BindingSource;
      return pageData.TotalCount;
    }
    private int pager1_EventPaging(WindowsApp.MyControl.EventPagingArg e)
    {
      return dgvBind();
    }

Ecco l'effetto:

Download del codice sorgente:http://xiazai.jb51.net/201609/yuanma/winformPager(jb51.net).rar

Questo è tutto il contenuto dell'articolo, spero che sia utile per la tua apprendimento, e spero che tutti possano sostenere il tutorial Yell.

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