ASP.NET 2.0 中動態新增 GridView 模板列的例子
阿新 • • 發佈：2019-02-10
<%@ Page Language="C#"%>
<%@ Import Namespace="System.Data"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">
ICollection CreateDataSource()
{
DataTable dt =new DataTable(); DataRow dr; dt.Columns.Add(new DataColumn("text", typeof(string))); for (int i =0; i <6; i++) { dr = dt.NewRow(); dr[0] = i; dr[1] ="列表專案 "+ i.ToString(); dt.Rows.Add(dr);
} DataView dv =new DataView(dt); return dv; public class GridViewTemplate : ITemplate { private DataControlRowType templateType; private string columnName; public GridViewTemplate( DataControlRowType type, string colname ) { templateType = type; columnName = colname; } public void InstantiateIn( System.Web.UI.Control container ) switch (templateType) { case DataControlRowType.Header: Literal lc =new Literal(); lc.Text = columnName; container.Controls.Add(lc); break; case DataControlRowType.DataRow: DropDownList drr =new DropDownList(); drr.ID ="dropdown"; drr.AppendDataBoundItems =true; drr.Items.Add(new ListItem("-----請選擇------","")); drr.Items.Add(new ListItem("AA", "a")); drr.Items.Add(new ListItem("BB", "b")); drr.Items.Add(new ListItem("CC", "c")); container.Controls.Add(drr); break; default: break; } } } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { TemplateField customField =new TemplateField(); customField.ShowHeader =true; customField.HeaderTemplate =new GridViewTemplate(DataControlRowType.Header, "動態新增列"); customField.ItemTemplate =new GridViewTemplate(DataControlRowType.DataRow, ""); GridView1.Columns.Add(customField); GridView1.DataSource = CreateDataSource(); GridView1.DataBind(); } } protected void GridView1_RowDataBound( object sender, GridViewRowEventArgs e ) { if (e.Row.RowType == DataControlRowType.DataRow) { //可以在這裡訪問資料庫的其它欄位的值，可以設定預設選擇項，具體應用，看自己的發揮了。//下面只是例子，舉一反三，不再費話了 DataRowView gv = (DataRowView)e.Row.DataItem; int itemSeleted = Int32.Parse(gv.Row["id"].ToString()) >3?0 : Int32.Parse(gv.Row["id"].ToString()); DropDownList dr = (DropDownList)e.Row.FindControl("dropdown"); dr.SelectedIndex = itemSeleted; }
}</script><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title>GridView動態新增模板列的例子</title></head><body><form id="form1" runat="server"> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound"> <Columns> <asp:BoundField HeaderText="標題" DataField="text"/> </Columns> </asp:GridView> </form></body></html>