早上看到有位同學(xué)問關(guān)于自動生成GridVie并且添加DataKeyNames屬性后

回調(diào)頁面時，出現(xiàn)錯誤異常.下面是我實現(xiàn)的方法。注意一點。就是數(shù)據(jù)綁定的時間。

要是先綁定，再添加到div1中，回調(diào)頁面時，就會出錯。

頁面代碼：

??? <div runat="server" id="div1" enableviewstate="false">
??? </div>
??? <asp:Button ID="Button1" runat="server" οnclick="Button1_Click" Text="Button" />

?

cs代碼：

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??? protected void Page_Load(object sender, EventArgs e)
??? {
??????? bindGV();
??? }
??? private static DataTable NewMethod()
??? {
??????? DataTable dt = new DataTable();
??????? dt.Columns.Add("id", typeof(int));
??????? dt.Columns.Add("name", typeof(string));
??????? for (int i = 0; i < 5; i++)
??????? {
??????????? DataRow dr = dt.NewRow();
??????????? dr["id"] = i;
??????????? dr["name"] = "Name" + i;
??????????? dt.Rows.Add(dr);
??????? }
??????? return dt;
??? }
??? private void bindGV()
??? {
??????? div1.Controls.Clear();
??????? int t = 0;
??????? while (t < 3)
??????? {
??????????? GridView gv = new GridView();
??????????? gv = CreateSuperGrid();
??????????? div1.Controls.Add(gv);
??????????? t++;
??????? }
??????? for (int i = 0; i < div1.Controls.Count;i++ )
??????? {
??????????? //我這里是先把GridView加入div1中，之后才進(jìn)行數(shù)據(jù)綁定
??????????? ((GridView)div1.Controls[i]).DataSource = NewMethod();
??????????? ((GridView)div1.Controls[i]).DataBind();
??????? }

??? }

??? private GridView CreateSuperGrid()
??? {
??????? GridView gv = new GridView();
??????? gv.AutoGenerateColumns = false;
??????? gv.EnableViewState = true;
??????? gv.DataKeyNames = new string[] { "id" };

??????? BoundField bf = new BoundField();
??????? bf = new BoundField();
??????? bf.HeaderText = "序號";
??????? bf.DataField = "id";
??????? gv.Columns.Add(bf);

??????? BoundField bf2 = new BoundField();
??????? bf2.HeaderText = "名稱";
??????? bf2.DataField = "name";
??????? gv.Columns.Add(bf2);

??????? CommandField cf = new CommandField();
??????? cf.ShowSelectButton = true;
??????? gv.Columns.Add(cf);

??????? gv.SelectedIndexChanging += new GridViewSelectEventHandler(GridView1_SelectedIndexChanged);

??????? return gv;
??? }

??? //用做回調(diào)頁面用的
??? protected void Button1_Click(object sender, EventArgs e)
??? {

??? }
??? protected void GridView1_SelectedIndexChanged(object sender, GridViewSelectEventArgs e)
??? {
??????? string value = ((System.Web.UI.WebControls.GridView)(sender)).DataKeys[e.NewSelectedIndex].Value.ToString();//這里可以看到取到的id值
??? }

轉(zhuǎn)載于:https://www.cnblogs.com/yijie/archive/2008/09/04/1283883.html

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