DevExpress中GridControl列轉(zhuǎn)義的實現(xiàn)方法

更新時間：2014年08月06日 16:36:54 投稿：shichen2014

這篇文章主要介紹了DevExpress中GridControl列轉(zhuǎn)義的實現(xiàn)方法,在項目開發(fā)中有一定的實用價值,需要的朋友可以參考下

在一些項目的實際開發(fā)過程中，我們有時候需要對GridControl中列值進(jìn)行轉(zhuǎn)義，譬如1轉(zhuǎn)義成“完成”等等，一般在諸如CustomColumnDisplayText事件中能夠輕松完成，為了提高代碼復(fù)用性，所以需要對CustomColumnDisplayText進(jìn)行包裝。具體方法如下：

主要功能代碼如下：

/// <summary>
/// CustomColumnDisplayText Helper
/// </summary>
/// <param name="girdview">GridView</param>
/// <param name="fieldNameHandler">委托</param>
/// <param name="dispalyTextHandler">展現(xiàn)文字</param>
/// <param name="e">CustomColumnDisplayTextEventArgs</param>
public static void CusColDisplayTextHelper(this GridView girdview, Predicate<string> fieldNameHandler, Func<object, string> dispalyTextHandler, CustomColumnDisplayTextEventArgs e)
{
  if (fieldNameHandler(e.Column.FieldName))
  {
 e.DisplayText = dispalyTextHandler(e.Value);
  }
}
/// <summary>
/// CustomColumnDisplayText Helper
/// </summary>
/// <param name="girdview">GridView</param>
/// <param name="valueHandler">委托</param>
/// <param name="dispalyTextHandler">委托</param>
/// <param name="e">CustomColumnDisplayTextEventArgs</param>
public static void CusColDisplayTextHelper(this GridView girdview, Func<object, Type, bool> valueHandler, Func<object, string> dispalyTextHandler, CustomColumnDisplayTextEventArgs e)
{
  if (valueHandler(e.Value, e.Value.GetType()))
  {
 e.DisplayText = dispalyTextHandler(e.Value);
  }
}
/// <summary>
///CustomColumnDisplayText Helper
/// </summary>
/// <param name="girdview">GridView</param>
/// <param name="valueHandler">委托</param>
/// <param name="curdispalyText">展現(xiàn)文字</param>
/// <param name="e">CustomColumnDisplayTextEventArgs</param>
public static void CusColDisplayTextHelper(this GridView girdview, Func<object, Type, bool> valueHandler, string curdispalyText, CustomColumnDisplayTextEventArgs e)
{
  if (valueHandler(e.Value, e.Value.GetType()))
  {
 e.DisplayText = curdispalyText;
  }
}

代碼使用方法如下：

private void gvLampConfig_CustomColumnDisplayText(object sender, CustomColumnDisplayTextEventArgs e)
{
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampViDirection"), value => value.ToInt(1) == 1 ? "正向" : "反向", e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampWorkStatus"), TranLampWorkType, e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("CTUChNo"), value => string.Format("第{0}回路", value), e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampPhase"), TranLampPhase, e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampDeviceType"), TranLampDeviceType, e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampPower"), value => string.Format("{0} W", value), e);
  gvLampConfig.CusColDisplayTextHelper(name => name.Equals("LampIntensity"), value => string.Format("{0} %", value), e);
  gvLampConfig.CusColDisplayTextHelper((value, type) => value.ToInt(-1) == -1 && type == typeof(Int32), "不修改", e);
}
private string TranLampDeviceType(object type)
{
  int _type = type.ToInt(-1);
  if (_type == 1) return "鈉燈";
  if (_type == 2) return "LED燈";
  if (_type == 3) return "無極燈";
  return "--";
}
private string TranLampPhase(object type)
{
  int _type = type.ToInt(-1);
  if (_type == 0) return "未知";
  if (_type == 1) return "A相";
  if (_type == 2) return "B相";
  if (_type == 3) return "C相";
  return "--";
}
private string TranLampWorkType(object type)
{
  int _type = type.ToInt(-1);
  if (_type == 0) return "關(guān)閉但不刪除";
  if (_type == 1) return "啟用";
  if (_type == 2) return "刪除";
  return "--";
}

代碼運行效果如下所示：