We should know boxing and unboxing clearly. But what's the actual performance affect happened in that process? Below diagram can give a overview:A boxing process will bring in two copies of the same data on both stack and managed heap finally; while
The tradeoff between decimal and double is precision versus range. The decimal is the best choice when precision is required, but choose a double for the greatest range. The decimaltype is well suited for financial calculations, as shown in the
1. Why need it?Mainly it works as the bridge between managed code and native c++ code, as it's the only graceful way to be able to talk to both sides.Using /cli compiler option, it can generate mixed code to benefit below
1. Place your cursor, by a single click, immediately after the closing curly brace of theMain method. This highlights the beginning and closing braces.2. Press Ctrl+Enter. This inserts a new line between the curly braces, moves the cursor tothat
In C#, you have four types of method parameters: value, ref, out, and params.1. The default parameter type is value.2. If you want calling code to see changes to a value type variable, the parameter type should be ref. Ref parameters definitely must
In C#, content regards with string includes:1. String typeIts features: a. built-in reference type. b. immutable (meaning that a string can’t be modified once created) and sealed (meaning that it can’t be derived from). c. string equality
因為新項目將主要用到CSharp,並同時會涉及Mix programming的問題,與Native C++ and C++ CLI (common language infrastructure),今天迅速的google下,做些初步瞭解先。現在的理解:1. 這裡說的mix programming的意思應該是:讓CSharp的module,Native C++ module和C++ CLI的module之間可以互相調用。當然不是把這不同語言的code直接寫在一起嘍。。2.
1. 什麼是rValue?lValue呢?rValue主要是指沒有名字的變數(即臨時變數/對象);lValue主要是指有名字的變數。除了lValue都是rValue(廢話)。下面的例子可以比較直觀的協助理解:int&& n = 42; // OK; 42 is an rvalue; n is rvalue reference.int k = n; // OK; n is rValue reference and is lValue.int&& j =
Form1 f1 =new Form1();f1.parameter["XXX"]="XXX";(字串)f1.show();當在f1中使用這個值時這樣接值string s = type(me.parameter["XXX"],"string")VB.NET的文法我寫的這幾句可能有錯誤但大意就是這樣了我後來看了一下這個DLL原來這個parameter是個hashtable像他這種表單間的傳值的方法可以傳個種類型的值我的問題就是:這個父表單應該怎麼寫,讓繼承他的表單都能實現我說的這種方法來傳值??
在網上找了很長時間,沒有發現很好的用C#實現BHO的中文資料。沒有辦法,只好去找頭痛的english資料了。老外還是走在前頭,這方面資料還蠻多,下面是我找的兩個地址,還沒好好看,先放這裡。等以後把自己的心得放上來。Build a Managed BHO and Plug into the Browser:http://www.15seconds.com/issue/040331.htmAutoSig: A browser helper object that automatically