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  • C#教程之DevExpress中GridControl列转义的实现方法

在一些项目的实际开发过程中，我们有时候需要对GridControl中列值进行转义，譬如1转义成“完成”等等，一般在诸如CustomColumnDisplayText事件中能够轻松完成，为了提高代码复用性，所以需要对CustomColumnDisplayText进行包装。具体方法如下：

主要功能代码如下：

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/// <summary>
/// CustomColumnDisplayText Helper
/// </summary>
/// <param name="girdview">GridView</param>
/// <param name="fieldNameHandler">委托</param>
/// <param name="dispalyTextHandler">展现文字</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">展现文字</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;
  }
}

代码使用方法如下：

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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 "钠灯";
  if (_type == 2) return "LED灯";
  if (_type == 3) return "无极灯";
  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 "关闭但不删除";
  if (_type == 1) return "启用";
  if (_type == 2) return "删除";
  return "--";
}

代码运行效果如下所示：


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