GrapeCity的Combo事件：奇怪的SelectedIndexChanged

cmbHaitatubin,cmbShukkasoko,Combo3
  private void cmbShukkasoko_SelectedIndexChanged(object sender, System.EventArgs e)
  {
   if( -1 == cmbShukkasoko.SelectedIndex )
   {
    clsFormFunction.ComboClear( cmbHaitatubin );
    return;
   }

   string strBushoSokoCode = clsFormFunction.GetComboCD( cmbShukkasoko );

   HaitatubinGet( strBushoSokoCode, ref strMsg );
  }

  private int HaitatubinGet( string strBushoSokoCode, ref string strMsg )
  {
   。。。。。。。。
   intRet = CMPSpKick( strSPName, dtsInParam, ref dtsOutParam, ref dtsHaisouBin );

   if( intRet != 0 )
   {
    strMsg = OutParamGet( dtsOutParam.Tables[0], "@o_ERRMSG" );
    return intRet;
   }

   string strDefault = OutParamGet( dtsOutParam.Tables[0], "@o_CmbDefValue" );
   clsFormFunction.ComboDataSetMake( ref dtsCmb, dtsHaisouBin.Tables[0], "BIN", "HAISO_ROOT_MJ" );   
   clsFormFunction.ComboBind( cmbHaitatubin, dtsCmb );
   clsFormFunction.ComboSelect( cmbHaitatubin, strDefault );

   clsFormFunction.SetComboPixWidth( cmbHaitatubin );
   cmbHaitatubin.SelectionStart = 0;
   cmbHaitatubin.SelectionLength = 0;

   return 0;
  }

//cmbHaitatubin,cmbShukkasoko,Combo3's Leave event
  private void combo_FocusLosted(object sender, System.EventArgs e)
  {
   FormFunction clsFormFunction = new FormFunction();
   clsFormFunction.combo_FocusLosted( sender );

   switch (((Control)sender).Name)
   {
    case "cmbShukkasoko":
     if( cmbShukkasoko.SelectedIndex == -1 )
     {
      clsFormFunction.ComboClear( cmbHaitatubin );
      return;
     }
     break;
   }
  }
现象：1 cmbShukkasoko的text是All items text一部分时，click Combo3, cmbShukkasoko不能自动选择匹配的Item，但
click文本控件（非Combo）时正常（能自动选择匹配的Item）。
2 cmbShukkasoko的SelectedIndexChanged时，
cmbHaitatubin不能自动选择某一项。
*****I 服了GrapeCity.Win.Input ..........

答：在另一个事件combo_TextChanging里，使用了GrapeCity提供的Combo.FindString( ... )，该函数在某些情况不能
检索出对应的Item。结果每次设置SelectedIndex 时，Combo.Text改变，但combo_TextChanging里的Combo.FindString( ... )检索不出，导致e.Cancel = true。

GrapeCity, I fu le u .

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