私のカスタムコントロールを作成する方法C＃？

Question

は、私は自分のcontrol.But私のコントロールのHTMLを記述しようとすると問題があります。私の検索ボタンが上に見える

のように見えます。しかし私は以下が必要です：どうすればいいですか？

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Web.UI.WebControls.WebParts; // Ekle 
using System.Web.UI.WebControls; // Ekle 
using System.Web.UI; 
using System.Collections; 
using System.Threading; 

namespace MyFilterControl 
{ 

    public class FilterControl : WebPart 
    { 
     internal List<Content> list { get; set; } 
     public Button BtnSearch { get; set; } 
     public event EventHandler Click; 
     public string FilterButtonText { get; set; } 
     public String PhID { get; set; } 
     internal PlaceHolder PlhControl { get; set; } 
     private string controlWidth = "10"; 
     public FilterControl() 
     { 

      list = new List<Content>(); 
      BtnSearch = new Button(); 
      PlhControl = new PlaceHolder(); 
      PlhControl.ID = Guid.NewGuid().ToString(); 
      if (string.IsNullOrEmpty(PhID)) 
      { 
       BtnSearch.ID = "btnSearch"; 
      } 
      else 
       BtnSearch.ID = PhID; 
      if (string.IsNullOrEmpty(FilterButtonText)) 
      { 
       BtnSearch.Text = "Search"; 
      } 
      else 
       BtnSearch.Text = FilterButtonText; 
      BtnSearch.Click += new EventHandler(BtnSearch_Click); 
     } 
     private Table mainTable = new Table(); 
     protected override void CreateChildControls() 
     { 
      base.CreateChildControls(); 
      TableRow tblRow = new TableRow(); 
      TableCell tblCell1 = new TableCell(); 

      PlhControl.Controls.Add(new LiteralControl("<table><tr>")); 
      tblCell1.Controls.Add(PlhControl); 
      TableCell tblCell2 = new TableCell(); 
      tblCell2.Controls.Add(BtnSearch); 
      tblRow.Cells.Add(tblCell1); 
      tblRow.Cells.Add(tblCell2); 
      mainTable.Rows.Add(tblRow); 
      this.Controls.Add(mainTable); 
     } 
     void BtnSearch_Click(object sender, EventArgs e) 
     { 
      PlhControl.Controls.Add(new LiteralControl("</tr><table>")); 

      foreach (var item in PlhControl.Controls) 
      { 
       if (item is MyTextBoxControl) 
       { 
        MyTextBoxControl t1 = (MyTextBoxControl)item; 
        if (t1.Text != "") 
        { 
         Add(new Content() { FieldName = t1.ID, Data = t1.Text, ID = Guid.NewGuid().ToString(), dataType = t1.dataType, filter=t1.filter }); 
        } 
       } 
      } 
      Click(this, e); 

     } 

     public string Query() 
     { 
      string Qry = String.Empty; 
      int i = 0; 
      foreach (var item in list) 
      { 
       switch (item.filter) 
       { 
        case Filter.BeginsWith: Qry += String.Format(item.FieldName.ToString() + ".StartsWith({0}) && ", "@" + i.ToString()); 
         break; 
        case Filter.EndsWith: Qry += String.Format(item.FieldName.ToString() + ".EndsWith({0}) && ", "@" + i.ToString()); 
         break; 
        case Filter.Contains: Qry += String.Format(item.FieldName.ToString() + ".Contains({0}) && ", "@"+i.ToString()); 
         break; 
        case Filter.Default: Qry += String.Format("{0}=={1} && ", item.FieldName, "@" + i.ToString()); 
         break; 
        default: 
         break; 
       } 

       i++; 
      } 
      Qry = Qry.TrimEnd('&', '&', ' '); 
      return Qry; 
     } 

     public object[] QueryParams() 
     { 
      ArrayList arrList = new ArrayList(); 
      foreach (var item in list) 
      { 
       if (item.dataType == DataType.String) 
       arrList.Add(item.Data); 
       else if (item.dataType == DataType.Int32) 
       { 
        int intVal = Convert.ToInt32(item.Data); 
        arrList.Add(intVal); 
       } 
      } 
      object[] strArray = arrList.ToArray(typeof(object)) as object[]; 
      return strArray; 
     } 

     public string id { get; set; } 
     public void AddItem(ContentItem content) 
     { 
      PlhControl.Controls.Add(new LiteralControl("<td style=\"text-align:left\">")); 
      PlhControl.Controls.Add(new Label() { ID = Guid.NewGuid().ToString(), Text = content.LabelName }); 
      PlhControl.Controls.Add(new LiteralControl(":</td>")); 
      PlhControl.Controls.Add(new LiteralControl("<td style=\"text-align:left\">")); 
      PlhControl.Controls.Add(new MyTextBoxControl() { ID = content.FieldName, dataType = content.dataType, filter = content.filter }); 
      PlhControl.Controls.Add(new LiteralControl("</td>")); 
     } 
     private void Add(Content content) 
     { 
      list.Add(new Content() { ID = content.ID, Data = content.Data, FieldName = content.FieldName, dataType=content.dataType, filter= content.filter }); 
     } 
    } 

    internal class Content 
    { 
     internal string ID { get; set; } 
     public string Data { get; set; } 
     public string FieldName { get; set; } 
     public DataType dataType { get; set; } 
     public Filter filter { get; set; } 
    } 

    public class ContentItem 
    { 
     private string ID { get; set; } 
     public string LabelName { get; set; } 
     public string FieldName { get; set; } 
     public DataType dataType { get; set; } 
     public Filter filter { get; set; } 
    } 

    public class MyTextBoxControl : TextBox 
    { 
     public DataType dataType { get; set; } 
     public Filter filter { get; set; } 
    } 

    public enum DataType 
    { 
     String,Int32 
    } 

    public enum Filter 
    { 
     BeginsWith,EndsWith,Contains,Default 
    } 
}