找到了具有相同ID“lebelId1”的多个控件。 FindControl要求控件具有唯一ID。 [英] Multiple controls with the same ID 'lebelId1' were found. FindControl requires that controls have unique IDs.

问题描述

找到了具有相同IDlebelId1的多个控件。 FindControl要求控件具有唯一ID。

 使用系统; 
 使用 System.Collections; 
 使用 System.Configuration; 
 使用 System.Data; 
 使用 System.Linq; 
 使用 System.Web; 
 使用 System.Web.Security; 
 使用 System.Web.UI; 
 使用 System.Web.UI.HtmlControls; 
 使用 System.Web.UI.WebControls; 
 使用 System.Web.UI.WebControls.WebParts; 
 使用 System.Xml.Linq; 
 使用 System.Data.SqlClient; 
 使用 ControlMethods_BL; 
 使用 CheckList_DAL; 
 
 命名空间 CheckList 
 {
  public   partial   class 主页：System.Web.UI.Page 
 {
  static   int  number =  2 ; 
 ControlMethod controlMethod =  new  ControlMethod（）; 
  string  strConn = connection.cn; 
 SqlConnection conn =  new  SqlConnection（）; 
 SqlCommand cmd; 
  //   UserRegistrationBL registration = new UserRegistrationBL（）;  
 TaskMaster taskMaster = < span class =code-keyword> new  TaskMaster（）; 
 SqlDataReader rdr; 
 受保护  void  Page_Load（ object  sender，EventArgs e）
 {
 DataReaderMethod（）; 
} 
 
  private   void  DataReaderMethod（）
 {
 conn.ConnectionString = strConn; 
  string  strQuery =  选择S.Id ，G.GMName，T.CheckPointTaskType，T.CheckRemark，来自tblTask​​MasterStatus S的S.TaskDate，tblTask​​Master T，tblGeneralMaster G其中S.TaskId = T.Id和T.ServerId = G.ID; 
 
 cmd =  new  SqlCommand（strQuery，conn）; 
 尝试 
 {
 conn.Open（）; 
 rdr = cmd.ExecuteReader（）; 
 
  while （rdr.Read（））
 {
 DynamicControlMethod（rdr）; 
} 
} 
  catch （例外情况）
 {
  throw   new 例外（ex.Message）; 
} 
 
 最后 
 {
 conn.Close（）; 
} 
} 
 
 私有  void  DynamicControlMethod（ SqlDataReader rdr）
 {
  for （ int  i =  1 ; i<数字模式=   hold /> ; {
表t =  new 表（）; 
 TableRow行=  new  TableRow（）; 
 
 TableCell cellId =  new  TableCell（）; 
 cellId.Width = Unit.Pixel（ 1 ）; 
标签labelID =  new  Label（）; 
 labelID.ID =   lebelId + i.ToString（）; 
 labelID.Text = rdr [  Id]。ToString（）; 
 cellId.Controls.Add（labelID）; 
 row.Cells.Add（cellId）; 
 pnlID.Controls.Add（row）; 
 
 TableCell cellGMName =  new  TableCell（）; 
 cellId.Width = Unit.Pixel（ 70 ）; 
标签lebelGMName = 新标签（）; 
 lebelGMName.ID =   lebelGMName + i.ToString（）; 
 lebelGMName.Text = rdr [  GMName]。ToString（）; 
 cellGMName.Controls.Add（lebelGMName）; 
 row.Cells.Add（cellGMName）; 
 pnlServerName.Controls.Add（row）; 
 
 TableCell cellCheckPointTaskType =  new  TableCell（）; 
 cellId.Width = Unit.Percentage（ 10 ）; 
 Label lebelCheckPointTaskType =  new  Label（）; 
 lebelCheckPointTaskType.ID =   lebelCheckPointTaskType + i.ToString（）; 
 lebelCheckPointTaskType.Text = rdr [  CheckPointTaskType]。ToString（）; 
 cellCheckPointTaskType.Controls.Add（lebelCheckPointTaskType）; 
 row.Cells.Add（cellCheckPointTaskType）; 
 pnlCheckPointTaskType.Controls.Add（row）; 
 
 TableCell cellCheckRemark =  new  TableCell（）; 
 cellId.Width = Unit.Percentage（ 30 ）; 
标签lebelCheckRemark = 新标签（）; 
 lebelCheckRemark.ID =   lebelCheckRemark + i.ToString（）; 
 lebelCheckRemark.Text = rdr [  CheckRemark]。ToString（）; 
 cellCheckRemark.Controls.Add（lebelCheckRemark）; 
 row.Cells.Add（cellCheckRemark）; 
 pnlCheckRemark.Controls.Add（row）; 
 
 TableCell cellSpace =  new  TableCell（）; 
 cellId.Width = Unit.Percentage（ 10 ）; 
 TextBox textboxSpace =  new  TextBox（）; 
 textboxSpace.ID =   textboxSpace + i.ToString（）; 
 cellSpace.Controls.Add（textboxSpace）; 
 row.Cells.Add（cellSpace）; 
 pnlSpace.Controls.Add（row）; 
 
 TableCell cellComment =  new  TableCell（）; 
 cellId.Width = Unit.Percentage（ 5 ）; 
 CheckBox checkBoxComment =  new  CheckBox（）; 
 checkBoxComment.ID =   checkBoxComment + i.ToString（）; 
 cellComment.Controls.Add（checkBoxComment）; 
 row.Cells.Add（cellComment）; 
 pnlCheck.Controls.Add（row）; 
 
 TableCell cellRemarks =  new  TableCell（）; 
 cellId.Width = Unit.Percentage（ 10 ）; 
 TextBox remarkTextBox =  new  TextBox（）; 
 remarkTextBox.ID =   remarkTextBox + i.ToString（）; 
 cellRemarks.Controls.Add（remarkTextBox）; 
 row.Cells.Add（cellRemarks）; 
 pnlRemarks.Controls.Add（row）; 
} 
} 
 
  public   void  btnSubmit_Click（  object  sender，EventArgs e）
 {
 
  string  strCon = ConfigurationManager.ConnectionStrings [  RealWorldConnectionString]。ConnectionString; 
 SqlConnection con =  new  SqlConnection（strCon）; 
 
  for （ int  i =  0 ; i <   1 ; i ++）
 {
  string  SpaceData =   textboxSpace + i.ToString（）; 
 TextBox txt =（TextBox）pnlSpace.FindControl（SpaceData）; 
} 
} 
} 
} 

请帮助我无法将数据插入数据库。

解决方案

错误非常明确：

找到了具有相同IDlebelId1的多个控件.DindControl要求控件具有唯一ID 。



因此，不是命名所有控件，而是添加相同的内容：

标签labelID = 新标签（）; 
 labelID.ID =   lebelId + i.ToString（）; 

创建一个类级整数，在开始从数据库读取之前将其设置为1：

 labelNumber =  1 ; 
  while （rdr.Read（））
 {
 DynamicControlMethod（rdr）; 
} 

并在您的标签构造代码中使用它：

标签labelID = 新标签（）; 
 labelID.ID =   lebelId + labelNumber ++。ToString（）; 

Multiple controls with the same ID 'lebelId1' were found. FindControl requires that controls have unique IDs.

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using ControlMethods_BL;
using CheckList_DAL;

namespace CheckList
{
    public partial class Home : System.Web.UI.Page
    {
        static int number = 2;
        ControlMethod controlMethod = new ControlMethod();
        string strConn = connection.cn;
        SqlConnection conn = new SqlConnection();
        SqlCommand cmd;
        //UserRegistrationBL registration = new UserRegistrationBL();
        TaskMaster taskMaster = new TaskMaster();
        SqlDataReader rdr;
        protected void Page_Load(object sender, EventArgs e)
        {
            DataReaderMethod();
        }

        private void DataReaderMethod()
        {
            conn.ConnectionString = strConn;
            string strQuery = "select S.Id, G.GMName, T.CheckPointTaskType, T.CheckRemark, S.TaskDate from tblTaskMasterStatus S, tblTaskMaster T, tblGeneralMaster G where S.TaskId=T.Id and T.ServerId=G.ID";

            cmd = new SqlCommand(strQuery, conn);
            try
            {
                conn.Open();
                rdr = cmd.ExecuteReader();

                while (rdr.Read())
                {                  
                        DynamicControlMethod(rdr);                   
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }

            finally
            {
                conn.Close();
            }
        }

        private void DynamicControlMethod(SqlDataReader rdr)
        {                  
                for (int i = 1; i <number mode="hold" />                {                    
                    Table t = new Table();
                    TableRow row = new TableRow();

                    TableCell cellId = new TableCell();                   
                    cellId.Width = Unit.Pixel(1);
                    Label labelID = new Label();
                    labelID.ID = "lebelId" + i.ToString();
                    labelID.Text = rdr["Id"].ToString();
                    cellId.Controls.Add(labelID);
                    row.Cells.Add(cellId);                   
                    pnlID.Controls.Add(row);

                    TableCell cellGMName = new TableCell();
                    cellId.Width = Unit.Pixel(70);
                    Label lebelGMName = new Label();
                    lebelGMName.ID = "lebelGMName" + i.ToString();
                    lebelGMName.Text = rdr["GMName"].ToString();
                    cellGMName.Controls.Add(lebelGMName);
                    row.Cells.Add(cellGMName);                    
                    pnlServerName.Controls.Add(row);

                    TableCell cellCheckPointTaskType = new TableCell();
                    cellId.Width = Unit.Percentage(10);
                    Label lebelCheckPointTaskType = new Label();
                    lebelCheckPointTaskType.ID = "lebelCheckPointTaskType" + i.ToString();
                    lebelCheckPointTaskType.Text = rdr["CheckPointTaskType"].ToString();
                    cellCheckPointTaskType.Controls.Add(lebelCheckPointTaskType);
                    row.Cells.Add(cellCheckPointTaskType);                    
                    pnlCheckPointTaskType.Controls.Add(row);

                    TableCell cellCheckRemark = new TableCell();
                    cellId.Width = Unit.Percentage(30);
                    Label lebelCheckRemark = new Label();
                    lebelCheckRemark.ID = "lebelCheckRemark" + i.ToString();
                    lebelCheckRemark.Text = rdr["CheckRemark"].ToString();
                    cellCheckRemark.Controls.Add(lebelCheckRemark);
                    row.Cells.Add(cellCheckRemark);                   
                    pnlCheckRemark.Controls.Add(row);
                   
                    TableCell cellSpace = new TableCell();
                    cellId.Width = Unit.Percentage(10);
                    TextBox textboxSpace = new TextBox();
                    textboxSpace.ID = "textboxSpace" + i.ToString();
                    cellSpace.Controls.Add(textboxSpace);
                    row.Cells.Add(cellSpace);                    
                    pnlSpace.Controls.Add(row);

                    TableCell cellComment = new TableCell();
                    cellId.Width = Unit.Percentage(5);
                    CheckBox checkBoxComment = new CheckBox();
                    checkBoxComment.ID = "checkBoxComment" + i.ToString();
                    cellComment.Controls.Add(checkBoxComment);
                    row.Cells.Add(cellComment);                   
                    pnlCheck.Controls.Add(row);

                    TableCell cellRemarks = new TableCell();
                    cellId.Width = Unit.Percentage(10);
                    TextBox remarkTextBox = new TextBox();
                    remarkTextBox.ID = "remarkTextBox" + i.ToString();
                    cellRemarks.Controls.Add(remarkTextBox);
                    row.Cells.Add(cellRemarks);                   
                    pnlRemarks.Controls.Add(row);                
                }            
        }

        public void btnSubmit_Click(object sender, EventArgs e)
        {

            string strCon = ConfigurationManager.ConnectionStrings["RealWorldConnectionString"].ConnectionString;
            SqlConnection con = new SqlConnection(strCon);

            for (int i = 0; i < 1; i++)
            {
                string SpaceData = "textboxSpace" + i.ToString();
                TextBox txt = (TextBox)pnlSpace.FindControl(SpaceData);          
            }               
        }
    }
}

Kindly help I am unbale to insert data into database.

解决方案

The error is pretty explicit:
"Multiple controls with the same ID 'lebelId1' were found. FindControl requires that controls have unique IDs."

So instead of naming all the controls you add the same:

Label labelID = new Label();
labelID.ID = "lebelId" + i.ToString();

Create a class level integer, set it to one before you start reading from your DB:

labelNumber = 1;
while (rdr.Read())
   {
   DynamicControlMethod(rdr);
   }

And use that in your label construction code:

Label labelID = new Label();
labelID.ID = "lebelId" + labelNumber++.ToString();

这篇关于找到了具有相同ID“lebelId1”的多个控件。 FindControl要求控件具有唯一ID。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！