Asp.net与C＃怀疑 [英] Asp.net with C# doubts

问题描述

textbox1.text =和 textbox1.text = null 和 textbox1.text = string.empty 之间有什么区别。我需要知道以上三者之间的区别。

what is difference between textbox1.text = "" and textbox1.text = null and textbox1.text = string.empty . i need to know difference between this above three.

推荐答案

string.empty与相同。 Null可能渲染相同，因为它还能做什么？在ASP.NET中，在回发之后，这三者之间肯定没有区别。

string.empty is the same as "". Null probably renders the same, because what else can it do ? In ASP.NET, after a postback, there is definitely no difference between those three.

textbox1.text =和textbox1.text = string.empty



都产生相同的结果



textbox1.text = null





为textbox1分配一些值（如果之前定义为null）

textbox1.text = "" and textbox1.text = string.empty

both produce same results

textbox1.text = null


assigning some value to textbox1(if null is defined earlier)

hi，



i want计算3个文本框值到textbox4的自动结果，并将这些值插入到数据库中。

请帮我紧急.........

i want to calculate 3 text box values to automatic result in textbox4, and also this values are inserted to the database.
Please help me urgent.........

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