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System.ArgumentOutOfRangeException: Index and length must refer to a location within the string. Parameter name: length at System.String.Substring(Int32 startIndex, Int32 length) at ScholarFormDetail1112122.btn_submit_Click(Object sender, EventArgs e)
我尝试过的:
System.ArgumentOutOfRangeException: Index and length must refer to a location within the string. Parameter name: length at System.String.Substring(Int32 startIndex, Int32 length) at ScholarFormDetail1112122.btn_submit_Click(Object sender, EventArgs e)
解决方案1
看看下面的例子:
public class Program { public static void Main() { string test= "0123456789"; // 1.) Will fail, because max. Index will be 9 // string subString0= test.Substring(10, 1); // 2.) Ok string subString1= test.Substring(9, 1); // 3.) Will fail because there is only one character available. See note *1) // string subString2= test.Substring(9, 100); // 4.) Ok string subString3= test.Substring(9, 1); } }
注*1)
在这种情况下抛出异常是值得怀疑的。 大多数其他语言只会返回可用的字符。
[Edit]
注*1),感谢Richard的提示。
有些语言在这种情况下不会抛出异常。
我希望它有帮助。
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