viewstate和datatable動態錄入數據示例

2024-07-10 12:43:44

字體：大中小

來源：轉載

供稿：網友

代碼如下:
<%@ Page Language="C#" EnableViewState="true" %>
<%@ 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">
private DataTable stoveTable = null;
protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
      //創建 EmptyDataTemplate
      this.GridView_list.DataBind();
    }
}

protected void GridView_list_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
      String usage = DataBinder.Eval(e.Row.DataItem, "usage").ToString();
      String steelKind = DataBinder.Eval(e.Row.DataItem, "steelKind").ToString();
      String castingTon = DataBinder.Eval(e.Row.DataItem, "castingTon").ToString();
      DropDownList x1 = e.Row.FindControl("x1") as DropDownList;
      DropDownList x2 = e.Row.FindControl("x2") as DropDownList;
      TextBox x3 = e.Row.FindControl("x3") as TextBox;
      x3.Text = castingTon;
      ListItem xx1 = x1.Items.FindByValue(usage);
      if (xx1 != null) xx1.Selected = true;
      ListItem xx2 = x2.Items.FindByValue(steelKind);
      if (xx2 != null) xx2.Selected = true;
    }
}

protected void LinkButton1_Click(object sender, EventArgs e)
{
    DropDownList x1, x2;
    TextBox x3;
    if (GridView_list.Rows.Count == 0)
    {
      x1 = GridView_list.Controls[0].Controls[0].FindControl("x1") as DropDownList;
      x2 = GridView_list.Controls[0].Controls[0].FindControl("x2") as DropDownList;
      x3 = GridView_list.Controls[0].Controls[0].FindControl("x3") as TextBox;
    }
    else
    {
      GridViewRow r = GridView_list.FooterRow;
      x1 = r.FindControl("x1") as DropDownList;
      x2 = r.FindControl("x2") as DropDownList;
      x3 = r.FindControl("x3") as TextBox;
    }
    if (ViewState["dt"] == null)
    {
      stoveTable = new DataTable();
      stoveTable.Columns.Add("usage", typeof(String));
      stoveTable.Columns.Add("steelKind", typeof(String));