asp.net优化(二)
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- Do not rely on exceptions in your code: Exceptions are very expensive and should rarely occur in your code. You should never use exceptions as a way to control normal program flow. If it is possible to detect in code a condition that would cause an exception, you should do that instead of waiting to catch the exception before handling that condition. Common scenarios include checking for null, assigning to a string that will be parsed into a numeric value, or checking for specific values before applying math operations. For example:
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// Consider changing this:try { result = 100 / num;}catch (Exception e) { result = 0;}// To this:if (num != 0) result = 100 / num;else result = 0;' Consider changing this:Try result = 100 / numCatch (e As Exception) result = 0End Try// To this:If Not (num = 0) result = 100 / numElse result = 0End If// Consider changing this:try { result = 100 / num;}catch (e:Exception) { result = 0;}// To this:if (num != 0) result = 100 / num;else result
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