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viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法-創(chuàng)新互聯(lián)

這篇文章主要講解了“viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法”，文中的講解內(nèi)容簡(jiǎn)單清晰，易于學(xué)習(xí)與理解，下面請(qǐng)大家跟著小編的思路慢慢深入，一起來研究和學(xué)習(xí)“viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法”吧！

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復(fù)制代碼 代碼如下:


<%@ Page Language="C#" EnableViewState="true" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "/tupian/20230522/<script runat="server">
  private DataTable stoveTable = null;
  protected void Page_Load(object sender, EventArgs e)
  {
    if (!Page.IsPostBack)
    {
      //創(chuàng)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));
      stoveTable.Columns.Add("castingTon", typeof(String));
    }
    else
    {
      stoveTable = (DataTable)ViewState["dt"];
    }
    DataRow newRow = stoveTable.NewRow();
    newRow["usage"] = x1.SelectedValue;
    newRow["steelKind"] = x2.SelectedValue;
    newRow["castingTon"] = x3.Text;
    stoveTable.Rows.Add(newRow);

    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();

  }
  protected void LinkButton2_Click(object sender, EventArgs e)
  {
    if (ViewState["dt"] == null)
    {
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    if (stoveTable.Rows.Count < 1) return;
    stoveTable.Rows.RemoveAt(stoveTable.Rows.Count - 1);
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
  }

  protected void x1_SelectedIndexChanged(object sender, EventArgs e)
  {
    DropDownList x1 = sender as DropDownList;
    GridViewRow r = x1.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["usage"] = x1.SelectedValue;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
  }

  protected void x2_SelectedIndexChanged(object sender, EventArgs e)
  {
    DropDownList x2 = sender as DropDownList;
    GridViewRow r = x2.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["steelKind"] = x2.SelectedValue;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
  }

  protected void x3_TextChanged(object sender, EventArgs e)
  {

    TextBox x3 = sender as TextBox;
    GridViewRow r = x3.Parent.Parent as GridViewRow;
    if (ViewState["dt"] == null)
    {
      Response.Write("Error");
      return;
    }
    stoveTable = (DataTable)ViewState["dt"];
    stoveTable.Rows[r.RowIndex]["castingTon"] = x3.Text;
    ViewState["dt"] = stoveTable;
    this.GridView_list.DataSource = stoveTable;
    this.GridView_list.DataBind();
  }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
  <title></title>
</head>
<body>
  <form id="form1" runat="server">
  <asp:GridView ID="GridView_list" runat="server" ShowFooter="true" AutoGenerateColumns="false"
    OnRowDataBound="GridView_list_RowDataBound">
    <EmptyDataTemplate>
      <table  cellspacing="0" rules="all"
        border="1">
        <tr>
          <th scope="col">
            選擇1
          </th>
          <th scope="col">
            選擇2
          </th>
          <th scope="col">
            輸入文字
          </th>
        </tr>
        <tr><td>
          <asp:DropDownList ID="x1" runat="server">
            <asp:ListItem>L0</asp:ListItem>
            <asp:ListItem>L1</asp:ListItem>
            <asp:ListItem>L2</asp:ListItem>
            <asp:ListItem>L3</asp:ListItem>
          </asp:DropDownList>
        </td><td>
          <asp:DropDownList ID="x2" runat="server">
            <asp:ListItem>10#</asp:ListItem>
            <asp:ListItem>20#</asp:ListItem>
            <asp:ListItem>30#</asp:ListItem>
            <asp:ListItem>40#</asp:ListItem>
          </asp:DropDownList>
        </td><td>
          <asp:TextBox ID="x3" runat="server"></asp:TextBox>
        </td></tr>
      </table>
    </EmptyDataTemplate>
    <Columns>
      <asp:TemplateField HeaderText="選擇1">
        <ItemTemplate>
          <asp:DropDownList ID="x1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="x1_SelectedIndexChanged">
            <asp:ListItem>L0</asp:ListItem>
            <asp:ListItem>L1</asp:ListItem>
            <asp:ListItem>L2</asp:ListItem>
            <asp:ListItem>L3</asp:ListItem>
          </asp:DropDownList>
        </ItemTemplate>
        <FooterTemplate>
          <asp:DropDownList ID="x1" runat="server">
            <asp:ListItem>L0</asp:ListItem>
            <asp:ListItem>L1</asp:ListItem>
            <asp:ListItem>L2</asp:ListItem>
            <asp:ListItem>L3</asp:ListItem>
          </asp:DropDownList>
        </FooterTemplate>
      </asp:TemplateField>
      <asp:TemplateField HeaderText="選擇2">
        <ItemTemplate>
          <asp:DropDownList ID="x2" runat="server" AutoPostBack="true" OnSelectedIndexChanged="x2_SelectedIndexChanged">
            <asp:ListItem>10#</asp:ListItem>
            <asp:ListItem>20#</asp:ListItem>
            <asp:ListItem>30#</asp:ListItem>
            <asp:ListItem>40#</asp:ListItem>
          </asp:DropDownList>
        </ItemTemplate>
        <FooterTemplate>
          <asp:DropDownList ID="x2" runat="server">
            <asp:ListItem>10#</asp:ListItem>
            <asp:ListItem>20#</asp:ListItem>
            <asp:ListItem>30#</asp:ListItem>
            <asp:ListItem>40#</asp:ListItem>
          </asp:DropDownList>
        </FooterTemplate>
      </asp:TemplateField>
      <asp:TemplateField HeaderText="輸入文字">
        <ItemTemplate>
          <asp:TextBox ID="x3" runat="server" AutoPostBack="true" OnTextChanged="x3_TextChanged"></asp:TextBox>
        </ItemTemplate>
        <FooterTemplate>
          <asp:TextBox ID="x3" runat="server"></asp:TextBox>
        </FooterTemplate>
      </asp:TemplateField>
    </Columns>
  </asp:GridView>
  <asp:LinkButton ID="LinkButton1" runat="server" Text="添加內(nèi)容" OnClick="LinkButton1_Click"></asp:LinkButton>
  <asp:LinkButton ID="LinkButton2" runat="server" Text="刪除內(nèi)容" OnClick="LinkButton2_Click"></asp:LinkButton>
  </form>
</body>
</html>


感謝各位的閱讀，以上就是“viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法”的內(nèi)容了，經(jīng)過本文的學(xué)習(xí)后，相信大家對(duì)viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法這一問題有了更深刻的體會(huì)，具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是創(chuàng)新互聯(lián)網(wǎng)站建設(shè)公司，，小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章，歡迎關(guān)注！

本文標(biāo)題：viewstate和datatable動(dòng)態(tài)錄入數(shù)據(jù)的方法-創(chuàng)新互聯(lián)
標(biāo)題來源：http://chinadenli.net/article42/cepghc.html

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