C#数据类型转换大全

2、Value Type间的转换。

bool bo = true;

byte b = 9;

char c = 'a';

sbyte sb = 8;

short s = 8;

int i = 7;

uint u = 6;

long l = 5;

this.textBox1.Text = "datatype";

this.textBox1.AppendText("bool bo=" + bo.ToString() + ""n");

this.textBox1.AppendText("byte b= " + b.ToString() + ""n");

this.textBox1.AppendText("char c= " + c.ToString() + ""n");

this.textBox1.AppendText("sbyte sb= " + sb.ToString() + ""n");

this.textBox1.AppendText("short s= " + s.ToString() + ""n");

this.textBox1.AppendText("int i= " + i.ToString() + ""n");

this.textBox1.AppendText("uint u=" + u.ToString() + ""n");

this.textBox1.AppendText("long l= " + l.ToString() + ""n");

此段代码并没有转换数据类型，只说明它们的类型公别还是System.bool型…System.long型。

追加一行：int g = 1;
short h = g;
this.textBox1.AppendText("h = " + h.ToString() + ""n");

结果编译报错：
　　G:"Projects"Visual C#"Convert"Form1.cs(118): 无法将类型“int”隐式转换为“short”
数据要进行强制转换。

如上例修改如下：

short g = 1;
byte h = (byte) g; // 将 short 型的 g 的值强制转换成byte型后再赋给变量 h
this.textBox1.AppendText("h = " + h.ToString() + ""n");

就可以了！

Short->byte

short g = 265; //265 = 255 + 10
byte h = (byte) g;
this.textBox1.AppendText("h = " + h.ToString() + ""n");

注意：溢出问题！

3、ASCII<->Unicode

char ch = 'a';

short ii = 65;

this.textBox1.Text = "";

this.textBox1.AppendText("The ASCII code of "'" + ch + ""' is: " + (short)ch + ""n");

this.textBox1.AppendText("ASCII is " + ii.ToString() + ", the char is: " + (char)ii + ""n");

char name1 = '屈';

char name2 = '志';

short name3 = 21195;

this.textBox1.AppendText("The Unicode of "'" + name1 + ""' is: " + (short)name1 + ""n");

this.textBox1.AppendText("The Unicode of "'" + name2 + ""' is: " + (short)name2+ ""n");

this.textBox1.AppendText("Unicode is " + name3.ToString() + ", the name3 is: " + (char)name3 + ""n");
　　它的运行结果是

The ASCII code of 'a' is: 97

ASCII is 65, the char is: A

The Unicode of '屈' is: 23624

The Unicode of '志' is: 24535

Unicode is 21195, the name3 is: 勋