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DataGrid同时具有分页和排序功能及注意点

 2005-02-01 16:59:58 来源:WEB开发网   
核心提示: 当DataGrid同时具有分页和排序功能时应注意在重新绑定数据源时,MyDataGrid.CurrentPageIndex=0;下面给实现以上功能的原码,DataGrid同时具有分页和排序功能及注意点,也就不多缀了aspx中包含有DataGrid和控制其数据源变化的dropdownlistDataGrid代码 &

   当DataGrid同时具有分页和排序功能时应注意在重新绑定数据源时,MyDataGrid.CurrentPageIndex=0;
下面给实现以上功能的原码,也就不多缀了aspx中包含有DataGrid和控制其数据源变化的dropdownlist
DataGrid代码
  <asp:datagrid id="MyDataGrid" runat="server" BorderColor="#CCCCCC" Font-Size="100%" HorizontalAlign="Center"
       AutoGenerateColumns="False" OnDeleteCommand="MyDataGrid_Delete" OnSortCommand="Sort_Grid" OnPageIndexChanged="MyDataGrid_PageIndexChanged"
       DataKeyField="ACC_NO" PagerStyle-Position="Bottom" PagerStyle-HorizontalAlign="Center" PagerStyle-Mode="NextPRev"
       PageSize="10" AllowSorting="True" AllowPaging="True" CellPadding="4" Width="100%">
       <AlternatingItemStyle BackColor="#E9E9E6"></AlternatingItemStyle>
       <HeaderStyle Font-Bold="True" Wrap="False" ForeColor="White" BackColor="#999999"></HeaderStyle>
       <Columns>
       <asp:ButtonColumn Text="口" CommandName="Delete"></asp:ButtonColumn>
       <asp:BoundColumn DataField="NO" SortExpression="NO" ReadOnly="True" HeaderText="序号"></asp:BoundColumn>
       <asp:BoundColumn DataField="ID" SortExpression="ID" HeaderText="ID"></asp:BoundColumn>
       <asp:BoundColumn DataField="NAME" SortExpression="NAME" HeaderText="名称"></asp:BoundColumn>
       <asp:BoundColumn DataField="C_NAME" SortExpression="C_NAME" HeaderText="各科名称"></asp:BoundColumn>
       <asp:BoundColumn DataField="FLG" SortExpression="FLG" HeaderText="项目"></asp:BoundColumn>
       </Columns>
       <PagerStyle NextPageText="下10件" PrevPageText="返回" HorizontalAlign="Center"></PagerStyle>
      </asp:datagrid>


dropdownlist代码
<asp:dropdownlist id="ddlWk" Runat="server" AutoPostBack="True" Enabled="False">
        <asp:ListItem Value="0">东京</asp:ListItem>
        <asp:ListItem Value="3">九州</asp:ListItem>
        <asp:ListItem Value="8">北海道</asp:ListItem>
        <asp:ListItem Value="9">四国</asp:ListItem>
        </asp:dropdownlist>

aspx.cs文件代码核心如下:
private void Page_Load(object sender, System.EventArgs e)
  {
  if(!IsPostBack)
  {
    session["WP"] ="0";
    ddlWk_getS();
    BindGrid();
  } 
  }
  private void ddlWk_getS()
  {
  switch (Session["WP"].ToString())
  {
   case "0":ddlWk.SelectedIndex=0;
   break;
   case "3":ddlWk.SelectedIndex=1;
   break;
   case "8":ddlWk.SelectedIndex=2;
   break;
   case "9":ddlWk.SelectedIndex=3;
   break;
   default:ddlWk.SelectedIndex=0;
   break;
  }
  }
  protected void BindGrid()
  {
  MyDataGrid.DataSource=GetData().Tables["vCO"].DefaultView;
  MyDataGrid.DataBind();
  //COUNT.Text=MyDataGrid.Columns.Count.ToString();
  }

  /// <summary>
  /// 返回Data
  /// </summary>
  ///<returns></returns>
  private DataSet GetData()
  {
  string strConn=(String) ((NameValueCollection) Context.GetConfig("system.web/database"))["strConn"];
  using (SqlConnection conn = new SqlConnection(strConn))
  {
   SqlCommand cmd = new SqlCommand("sp_C",conn);
   cmd.CommandType=CommandType.StoredProcedure;
   cmd.Parameters.Add("@place",SqlDbType.VarChar,2);
   cmd.Parameters["@place"].Value=Session["WP"].ToString();
   conn.Open();

   SqlDataAdapter da = new SqlDataAdapter();
   da.SelectCommand=cmd;
   DataSet ds=new DataSet();
   da.Fill(ds,"vCO");
   Count.Text="ヒット:"+ds.Tables["vCO"].Rows.Count.ToString()+"件";
   return ds;
  }

  }
  /// <summary>
  ///从DataSet中除一
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="E"></param>
  protected void MyDataGrid_Delete(Object sender, DataGridCommandEventArgs E)
  {
   String strID=MyDataGrid.DataKeys[(int)E.Item.ItemIndex].ToString();
   //删除操作
  }
  /// <summary>
  /// 分页操作
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  protected void MyDataGrid_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
  {
  MyDataGrid.CurrentPageIndex=e.NewPageIndex;
  BindGrid();
  }
  /// <summary>
  /// 排序
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  protected void Sort_Grid(object sender, DataGridSortCommandEventArgs e)
  {
  DataView dv= new DataView(GetData().Tables["vCO"]);
  dv.Sort= e.SortExpression.ToString();
  MyDataGrid.DataSource=dv;
  MyDataGrid.DataBind();
  }

  #region Web  override protected void OnInit(EventArgs e)
  {
  //  //
  InitializeComponent();
  base.OnInit(e);
  }
 
  /// <summary>  /// </summary>
  private void InitializeComponent()
  {  
  this.ddlWk.SelectedIndexChanged += new System.EventHandler(this.ddlWk_SelectedIndexChanged);
  this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private void ddlWk_SelectedIndexChanged(object sender, System.EventArgs e)
  {
  Session["WP"]=ddlWk.SelectedValue;
  MyDataGrid.CurrentPageIndex=0;//没有这一句,当该页码超出其他数据源的范围时会出错
  BindGrid();
  Response.Write( "<script language='javascript'>parent.menuframe.location.reload();</script>");
 
  }

Tags:DataGrid 同时 具有

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