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viewstate和datatable动态录入数据示例

2017年12月12日  | 移动技术网IT编程  | 我要评论

敬业福,刀剑神域第二季03,晋剧名家唱段

复制代码 代码如下:

<%@ 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)
    {
      //创建 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 style="border-collapse: collapse; width: 100%" cellspacing="0" rules="all"
        border="1">
        <tr>
          <th scope="col">
            选择1
          </th>
          <th scope="col">
            选择2
          </th>
          <th scope="col">
            输入文字
          </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="选择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="选择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="输入文字">
        <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="添加内容" onclick="linkbutton1_click"></asp:linkbutton>
  <asp:linkbutton id="linkbutton2" runat="server" text="删除内容" onclick="linkbutton2_click"></asp:linkbutton>
  </form>
</body>
</html>

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