用代码创建DataGrid的多链接及checkbox事件响应(downmoon)

本例用代码实现了创建DataGrid并响应了CheckBox事件，并实现了超链接列的多变量传送。

创建一个前台页面
CreateDataGrid.aspx:
在Form中添加一个PlcaeHolder,ID为"ph",Runat="Server"
后台页面
CreateDatagrid.aspx.cs

public class CreateDataGrid : System.Web.UI.Page     ...{         public String sql = "Select FirstName,LastName,HomePhone,Title FROM Employees";         public DataGrid mygrid = new DataGrid();         protected System.Web.UI.WebControls.PlaceHolder ph;         public String SortExpression;         private void Page_Load(object sender, System.EventArgs e)         ...{               //CreateDataGridForm.Controls.Add(MakeGrid());                          this.ph.Controls.Add(MakeGrid());         } //        protected override void CreateChildControls() //        {                          //base.CreateChildControls ();         //}         Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码         override protected void OnInit(EventArgs e)         ...{             //             // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。             //             InitializeComponent();             base.OnInit(e);         }                  /**//// <summary>         /// 设计器支持所需的方法 - 不要使用代码编辑器修改         /// 此方法的内容。         /// </summary>         private void InitializeComponent()         ...{                 this.Load += new System.EventHandler(this.Page_Load);         }         #endregion         /**//// <summary>         /// 创建一个模板列和一个列模板         /// </summary>         public TemplateColumn tm = new TemplateColumn();         public ColumnTemplate mycol = new ColumnTemplate();         //返回DataView         public DataView CreateDataSource ()         ...{             string strSql;             strSql = "Data Source=localhost;Initial Catalog=Northwind;User Id=sa;Password=sa;";             SqlConnection conn = new SqlConnection(strSql);             SqlDataAdapter db_sqladaptor = new SqlDataAdapter(sql,conn);             DataSet ds = new DataSet();             db_sqladaptor.Fill(ds,"Employees");             DataView myView = ds.Tables["Employees"].DefaultView;             //myView.Sort=SortExpression;             //Response.Write(sql);             return myView;         }         /**//// <summary>         /// 处理排序         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         public void Sort_Grid(Object sender, DataGridSortCommandEventArgs e)         ...{             SortExpression = e.SortExpression.ToString();             Session["SortField"]=SortExpression.Trim();             if(Session["Order"]==null) Session["Order"] = "ASC";             Session["Order"] = (Session["Order"].ToString()=="DESC")?"ASC":"DESC";             if(Session["SortField"]==null) Session["SortField"] = "FirstName";             sql += " ORDER BY "+Session["SortField"].ToString() + " " + Session["Order"].ToString();             mygrid.DataSource = CreateDataSource();             mygrid.DataBind();         }         /**//// <summary>         /// 创建和设置DataGrid属性，这里的属性设置为固定值，但也可以动态设置         /// </summary>         /// <returns></returns>         public DataGrid MakeGrid()         ...{             mygrid.CellPadding=2;             mygrid.Attributes.Add("align","center");             mygrid.CellSpacing=0;             mygrid.Width=500;             mygrid.BorderWidth=1;             mygrid.BorderColor=ColorTranslator.FromHtml("Black");             mygrid.AutoGenerateColumns=false;             mygrid.ForeColor=ColorTranslator.FromHtml("Black");             mygrid.Font.Size=9;             mygrid.Font.Name="宋体";             mygrid.AllowSorting=true;             /**////sort命令的事件处理器             //mygrid.SortCommand += new DataGridSortCommandEventHandler(Sort_Grid);             mygrid.ItemDataBound +=new DataGridItemEventHandler(mygrid_ItemDataBound);             /**////设置headerstyle             mygrid.HeaderStyle.BackColor=ColorTranslator.FromHtml("Gold");             mygrid.HeaderStyle.ForeColor=ColorTranslator.FromHtml("Black");             mygrid.HeaderStyle.Font.Name="宋体";             mygrid.HeaderStyle.Font.Size=9;             mygrid.HeaderStyle.Font.Bold=true;             mygrid.HeaderStyle.HorizontalAlign=HorizontalAlign.Center;             /**////设置alternating style             mygrid.AlternatingItemStyle.BackColor=ColorTranslator.FromHtml("Silver");             mygrid.AlternatingItemStyle.ForeColor=ColorTranslator.FromHtml("Black");             /**////设置itemstyle             mygrid.ItemStyle.HorizontalAlign=HorizontalAlign.Left;             /**////创建绑定列和属性             HyperLinkColumn FirstName = new HyperLinkColumn();             BoundColumn LastName = new BoundColumn();             BoundColumn HomePhone = new BoundColumn();             BoundColumn Title = new BoundColumn(); //            FirstName.HeaderText="名字"; //            FirstName.DataField="FirstName"; //            FirstName.SortExpression="FirstName";             FirstName.HeaderText="名字";                          FirstName.DataTextField ="FirstName";             FirstName.SortExpression="FirstName";             FirstName.NavigateUrl = "http://localhost/test.aspx";             LastName.HeaderText="姓";             LastName.DataField="LastName";             LastName.SortExpression="LastName";             HomePhone.HeaderText="电话";             HomePhone.DataField="HomePhone";             HomePhone.SortExpression="HomePhone";             Title.HeaderText="职务";             Title.DataField="Title";             Title.SortExpression="Title";             mygrid.Columns.AddAt(0, FirstName);             mygrid.Columns.AddAt(1, LastName);             mygrid.Columns.AddAt(2, HomePhone);             mygrid.Columns.AddAt(3, Title);             /**////设置模板列属性和ItemStyle模板             tm.HeaderText="**删除信息**";             tm.HeaderStyle.HorizontalAlign=HorizontalAlign.Center;             tm.ItemStyle.BackColor = ColorTranslator.FromHtml("#FFF778");             tm.ItemStyle.HorizontalAlign=HorizontalAlign.Center;                          TemplateColumn aa=new TemplateColumn();             ColumnTemplate1 tt = new ColumnTemplate1();             aa.ItemTemplate = tt;                          /**////创建列模板。             ///列模板从ITemplate继承             tm.ItemTemplate = mycol;             mygrid.Columns.AddAt(4, tm);             mygrid.Columns.AddAt(5,aa);               /**////绑定和返回             mygrid.DataSource = CreateDataSource();             mygrid.DataBind();             return mygrid;         }         private void mygrid_ItemDataBound(object sender, DataGridItemEventArgs e)         ...{             if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)             ...{                 HyperLink link  = (HyperLink)e.Item.Cells[0].Controls[0];                   string url = link.NavigateUrl; 　　　　//实现多参数链接                 url += "?id=" + e.Item.Cells[1].Text + "&id2=" + e.Item.Cells[2].Text;                 link.NavigateUrl = url;             }         }     }

再添加关键的几段

/**////  ColumnTemplate 从ITemplate继承。     ///  "InstantiateIn"定义子控件的属于谁     public class ColumnTemplate : ITemplate     ...{         public void InstantiateIn(Control container)         ...{             Label myLabel = new Label();             myLabel.Text="点击删除";             CheckBox mycheckbox = new CheckBox();             container.Controls.Add(myLabel);             container.Controls.Add(mycheckbox);         }     }

添加CheckBox事件：

public class ColumnTemplate1 : ITemplate     ...{         public void InstantiateIn(Control container)         ...{             Label myLabel = new Label();             myLabel.Text="test";             CheckBox lnk = new CheckBox();             lnk.AutoPostBack = true;             lnk.CheckedChanged +=new EventHandler(lnk_CheckedChanged);             container.Controls.Add(myLabel);             container.Controls.Add(lnk);         }         private void lnk_CheckedChanged(object sender, EventArgs e)         ...{             CheckBox lnk = (CheckBox)sender;             DataGrid dg = (DataGrid)lnk.NamingContainer.NamingContainer;             if(dg == null) return;              //实现CheckBox事件响应             DataGridItem di =(DataGridItem)lnk.NamingContainer;             HyperLink lnkID= (HyperLink)di.Cells[0].Controls[0];             string s2 =  lnkID.Text.Trim()+lnk.ID+"被选中了！";         }     }