/// <summary>
/// 說明：ICustomFormatter 實作
/// 目的：可以傳進自己想要定義的格式化資料
/// </summary>
/// <param name="format"></param>
/// <param name="arg"></param>
/// <param name="formatProvider"></param>
/// <returns></returns>
public string Format(string format, object arg, IFormatProvider formatProvider)
{
//這邊因為是範例所以簡化，如果有多個類別 可以先用IS判斷再轉到對應的型別，餵進對應的格式化
classPerson person = arg as classPerson;
if (person == null)
{
return(string.Empty);
}
switch (format)
{
case "Ch":
return(string.Format("{0} {1}", person.FirstName, person.LastName));
case "Eg":
return(string.Format("{0} {1}", person.LastName, person.FirstName));
case "ChM":
return(string.Format("{0} {1} : {2}", person.FirstName, person.LastName, person.IDCode));
default:
return(string.Format("{0} {1}", person.LastName, person.FirstName));
}
}
private void Form1_Load(object sender, EventArgs e)
{
//============ 1. 基本覆寫ToString() 格式化 + IFormattable 格式化(可帶參數的字串格式化)
classA objA = new classA();
classPerson objB = new classPerson()
{
IDCode = "H333456789", FirstName = "王", LastName = "小明"
};
//Class資訊(類別資訊)
var resultA = objA.ToString();
//王 小明
var resultB = objB.ToString("Ch", null);
//小明 王
var resullC = objB.ToString("Eg", null);
//王 小明
var resullD = objB.ToString();
//============= 2. 使用格式化器的方法
classPerson objC = new classPerson()
{
FirstName = "王", LastName = "大明", IDCode = "H333456790"
};
classPersonFormatter cpFormatter = new classPersonFormatter();
//王 大明
var result_objC_A = objC.ToString();
//王 大明
var result_objC_B = cpFormatter.Format("Ch", objC, null);
//大明 王
var resull_objC_C = cpFormatter.Format("Eg", objC, null);
//王 大明 : H333456790
var resull_objC_D = cpFormatter.Format("ChM", objC, null);
//============ 結合 1. 2.的方法
classPersonCombination objD =
new classPersonCombination()
{
FirstName = "王", LastName = "超明", IDCode = "H333456791"
};
classPersonFormatter cp2Formatter = new classPersonFormatter();
//王 超明
var result_objD_A = objD.ToString();
//王 超明
var result_objD_B = objD.ToString("Ch", cp2Formatter);
//超明 王
var resull_objD_C = objD.ToString("Eg", cp2Formatter);
//王 超明 : H333456791
var resull_objD_D = objD.ToString("ChM", cp2Formatter);
}
