TextBox重写Text属性

    /// <summary>
    /// 赋值文本
    /// </summary>
    protected string zText;
    /// <summary>
    /// 赋值文本
    /// </summary>
    public override string Text
    {
      set
      {
        base.Text = value;
        zText = value;
        //查找材料清单
        if (DtMat!=null)
        {
          var Dens = DtMat.AsEnumerable()
              .Where(p => p.Field<string>("MaterialName").ToUpper() == zText.ToUpper())
              .Select(p => p.Field<double>("MaterialDensity"));
          if (Dens.Count() > 0)
          {
            MatDensity = Dens.FirstOrDefault();
          }
          else
          {
            MatDensity = 0;
          }
        }
      }
      get
      {
        return base.Text;
      }
    }