string数组
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string[] s1 = new string[3] { "John", "Paul", "Mary" };
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if (s1.Contains("John"))
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Response.Write("fadfadfa");
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int数组
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int[] ia = {1,2,3};
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int id = Array.IndexOf(ia,value);
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if(id==-1)
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不存在
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else
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存在
string数组
int数组