按钮数组未触发的按钮单击事件

本文关键字：按钮 单击 事件 数组 | 更新日期: 2023-09-27 18:06:53

我想这个问题已经被问过很多次了(我自己问过一次)，但是我面临着一个新的问题。我正在创建一个按钮数组的onclick另一个按钮在我的应用程序。创建的按钮数量将取决于我从数据库中获得的值和我从数据库中获得的值取决于我在查询中传递的会话值。我的代码如下…

: 

   protected void attributes()
    {
     SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
    SqlCommand cmd = new SqlCommand("select attributesequenceNumber as attsno,ProductCode as pcode, P26 as '" + 26 + "',P28 as '" + 28 + "',P30 as '" + 30 + "',P32 as '" + 32 + "',P34 as '"+34+"',P36 as '"+36+"',P38 as '"+38+"',P40 as '"+40+"',P42 as '"+42+"',SHXS as XS,SHS as S,SHM as M,SHL as L,SHXL as XL,SHXXL as XXL from tblattribute where ProductCode='" + Session["ImgProdCode"] + "'", con);
    //SqlCommand cmd = new SqlCommand("select Col.value('local-name(.)', 'varchar(Max)') as ColName from (select * from tblattribute where ProductCode ='"+Session["ImgProdCode"]+"' for xml path(''), type) as T(XMLCol) cross apply T.XMLCol.nodes('*') as n(Col) where Col.value('.', 'varchar(1)') = 1 " , con);
    try
    {
        con.Open();
        cmd.ExecuteNonQuery();
        DataTable dtble = new DataTable();
        SqlDataAdapter dap = new SqlDataAdapter(cmd);
        dap.Fill(dtble);
        if (dtble.Rows.Count > 0)
        {
           result = dtble.Columns.Cast<DataColumn>()
        .Where(c => c.ColumnName != "pcode" && c.ColumnName != "attsno")
        .Where(c => dtble.Rows[0][c].ToString() == "1")
        .Select(c => c.ColumnName)
        .ToList();
            res = result.Count;
            lbl = new Button[res];
            for(i=0; i<result.Count; i++)
            {
                lbl[i] = new Button();
                lbl[i].Text = result[i];
                lbl[i].ID = "btn" + i.ToString();
                lbl[i].Width = 30;
                lbl[i].Click+=new EventHandler(lbl_click);
                lbl[i].CssClass = "label";
                div1.Controls.Add(lbl[i]);
            }
        }
    }
    catch
    {
        throw;
    }
    finally
    {
        if (con != null)
        {
            con.Close();
        }
    }
} 
protected void lbl_click(object sender, EventArgs e)
{
    Button lbl = sender as Button;
    lbl.CssClass = "label1";
}

上面的方法attributes()将在单击按钮时被调用，并且在单击按钮时也将生成会话值。在研究中，我知道动态按钮的创建应该在page_init事件中完成，但我不能在这里做。请帮忙解决这个问题

按钮数组未触发的按钮单击事件

看这里

http://blog.krisvandermast.com/AddingADynamicControlToAPlaceholderControlAndWireUpTheEvent.aspx

事件已经存在了，你只需要重新连接它。

您可以使用jQuery实现这一点。
为网页添加jQuery引用
获取适合类' label '的所有控件，在其click事件上调用服务器端' lbl_click '方法。
确保' lbl_click '方法应该被标记为静态，并以[webmethod]装饰。

Aspx页面

<script src="http://code.jquery.com/jquery-1.9.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
//Find all controls that belongs to class '.label'
//on its click event call the server side function.
  $(".label").click(function(e) {
    $.ajax({
      type: "POST",
      url: "Default.aspx/lbl_click",
      data: "{}", //can pass parameter here, if required
      contentType: "application/json; charset=utf-8",
      dataType: "json",
      error:
      function(XMLHttpRequest, textStatus, errorThrown) {
        //Handle error here.
      },
      success:
      function(result) {
      //Set button css class to 'label1' using jQuery.
      }
    });
  });
});
</script>
</head>


代码后面

  protected void attributes()
  {
   SqlConnection con = new 
SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ToString());
    SqlCommand cmd = new SqlCommand("select attributesequenceNumber as attsno,ProductCode as pcode, P26 as '" + 26 + "',P28 as '" + 28 + "',P30 as '" + 30 + "',P32 as '" + 32 + "',P34 as '" + 34 + "',P36 as '" + 36 + "',P38 as '" + 38 + "',P40 as '" + 40 + "',P42 as '" + 42 + "',SHXS as XS,SHS as S,SHM as M,SHL as L,SHXL as XL,SHXXL as XXL from tblattribute where ProductCode='" + Session["ImgProdCode"] + "'", con);
    //SqlCommand cmd = new SqlCommand("select Col.value('local-name(.)', 'varchar(Max)') as ColName from (select * from tblattribute where ProductCode ='"+Session["ImgProdCode"]+"' for xml path(''), type) as T(XMLCol) cross apply T.XMLCol.nodes('*') as n(Col) where Col.value('.', 'varchar(1)') = 1 " , con);
try
{
  con.Open();
  cmd.ExecuteNonQuery();
  DataTable dtble = new DataTable();
  SqlDataAdapter dap = new SqlDataAdapter(cmd);
  dap.Fill(dtble);
  if (dtble.Rows.Count > 0)
  {
    result = dtble.Columns.Cast<DataColumn>()
 .Where(c => c.ColumnName != "pcode" && c.ColumnName != "attsno")
 .Where(c => dtble.Rows[0][c].ToString() == "1")
 .Select(c => c.ColumnName)
 .ToList();
    res = result.Count;
    lbl = new Button[res];
    for (i = 0; i < result.Count; i++)
    {
      lbl[i] = new Button();
      lbl[i].Text = result[i];
      lbl[i].ID = "btn" + i.ToString();
      lbl[i].Width = 30;
      //lbl[i].Click += new EventHandler(lbl_click);
      lbl[i].CssClass = "label";
      div1.Controls.Add(lbl[i]);
    }
  }
}
catch
{
  throw;
}
    finally
    {
      if (con != null)
      {
        con.Close();
      }
    }
  } 

  [WebMethod]
  public static string lbl_click()
  {
    return "label1";
  }

相关文章：