![](/icons/98438zifu.gif)
![](/icons/98438de.gif)
![](/icons/98438yi.gif)
实现
![](/icons/98438de.gif)
![](/icons/98438de.gif)
![](/icons/98438zifu.gif)
![](/icons/98438de.gif)
![](/icons/98438yi.gif)
![](/icons/98438yi.gif)
![](/icons/98438yi.gif)
![](/icons/98438yi.gif)
![](/icons/98438zifu.gif)
输入: abc,defg,hijklmn,opq,rstuv (测试时按逗号分行, 可自定义分行符)
输出: abc
defg
hijklmn
opq
rstuv
Code
oldstr = textBox1.Text.Trim
;
![](/icons/98438string.gif)
str = oldstr.Split(',');
for (
i = 0; i <
str.Length; i
)
{
(richTextBox1.Text
"")
richTextBox1.Text =
str[i].![](/icons/98438ToString.gif)
;
![](/icons/98438else.gif)
richTextBox1.Text
"n" +
str[i].![](/icons/98438ToString.gif)
;
}
2. 将
![](/icons/98438zifu.gif)
输入: ABCDEFG
输出: GFEDCBA
Code
str1 = textBox1.Text.Trim
;
char
charstr = str1.ToCharArray
;
Array.Reverse(charstr);
str2 =
(charstr);
textBox2.Text = str2;
3. 巧截
![](/icons/98438zifu.gif)
![](/icons/98438de.gif)
输入: A23BCDEFG4Hi678
输出: 234678
Code
CharEnumerator CEnumerator = textBox1.Text.GetEnumerator
;
while (CEnumerator.MoveNext
)
{
![](/icons/98438byte.gif)
.gif' /> =
[1];
.gif' /> =
.Text.Encoding.ASCII.GetBytes(CEnumerator.Current.![](/icons/98438ToString.gif)
);
asciicode = (
)(
.gif' />[0]);
(asciicode >= 48 && asciicode <= 57)
{
textBox2.Text
CEnumerator.Current.![](/icons/98438ToString.gif)
;
}
}
4. 找出
![](/icons/98438zifu.gif)
![](/icons/98438yi.gif)
![](/icons/98438zifu.gif)
![](/icons/98438de.gif)
输入: aBcdaEFGaHIaaaK, 查找
![](/icons/98438zifu.gif)
输出: 0,4,8,11,12,13
Code
str = textBox1.Text.Trim
;
char
myChar = str.ToCharArray
;
for (
i = 0; i < myChar.Length; i
)
{
(myChar[i].![](/icons/98438ToString.gif)
textBox2.Text.Trim
)
MessageBox.Show("
串" + textBox2.Text.Trim
+ "在" + textBox1.Text.Trim
+ "中
位置为:" + i.![](/icons/98438ToString.gif)
+ "n");
}
5.从
![](/icons/98438zifu.gif)
输入: C:gdiplus.dll
输出: 路径: C
文件名: gdiplus
扩展名:dll
Code
strPath = textBox1.Text.Sub
(0, textBox1.Text.LastIndexOf(""));
strName=textBox1.Text.Sub
(textBox1.Text.LastIndexOf("")+1,(textBox1.Text.LastIndexOf(".")-textBox1.Text.LastIndexOf("")-1) );
strEName = textBox1.Text.Sub
(textBox1.Text.LastIndexOf(".")+1, (textBox1.Text.Length - textBox1.Text.LastIndexOf(".")-1));
MessageBox.Show("文件路径:"+strPath +"n 文件名:"+strName +"n 文件扩展名:"+strEName ,"信息",MessageBoxButtons.OK,MessageBoxIcon.Information );
6.批量替换某
![](/icons/98438yi.gif)
![](/icons/98438zifu.gif)
输入: abcdsfjlsdkfjalsdkabcdefadslkfjlksdafabc
查找: abc
替换: ***
输出: ***dsfjlsdkfjalsdk***defadslkfjlksdaf***
Code
public
M_
_index = -1;
private
M_
_start;
private
M_
_end;
M_
_index = 0;
while (M_
_index != -1)
{
M_
_start = 0;
M_
_end = richTextBox1.Text.Trim
.Length;
M_
_index = richTextBox1.Find(this.textBox1.Text.Trim
, M_
_start, M_
_end, RichTextBoxFinds.None);
(M_
_index
-1)
{
MessageBox.Show(this, "全部'" + this.textBox1.Text + "'已替换完毕
", "未找到",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
![](/icons/98438else.gif)
{
richTextBox1.SelectedText = textBox2.Text;
M_
_index
this.textBox1.Text.Length;
}
}
7.把
![](/icons/98438yi.gif)
![](/icons/98438de.gif)
![](/icons/98438zifu.gif)
![](/icons/98438yi.gif)
![](/icons/98438shuzu.gif)
输入: abc def ghiklm opq
输出: 可按
![](/icons/98438shuzu.gif)
Code
str = "abc def ghiklm opq";
![](/icons/98438string.gif)
strArr = str.Split(' ');
.Collections.ArrayList mylist =
.Collections.ArrayList
;
foreach (
strArray in strArr)
{
mylist.Add(strArray);
}
listBox1.DataSource = mylist;
8.对
![](/icons/98438zifu.gif)
输入: abc
输出: cvJ5W08AdsA=
Code
textBox1.ReadOnly = false;
try
{
DESCryptoServiceProvider descsp =
DESCryptoServiceProvider
;
![](/icons/98438byte.gif)
key = Encoding.Unicode.GetBytes(encryptKey);
![](/icons/98438byte.gif)
data = Encoding.Unicode.GetBytes(textBox1.Text.Trim
);
MemoryStream MStream =
MemoryStream
;
CryptoStream CStream =
CryptoStream(MStream, descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);
CStream.Write(data, 0, data.Length);
CStream.FlushFinalBlock
;
textBox2.Text = Convert.ToBase64String(MStream.ToArray
);
textBox3.Text = "";
textBox3.ReadOnly = true;
}
catch(Exception ex)
{
MessageBox.Show(ex.Message, "信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
9.对
![](/icons/98438zifu.gif)
输入: cvJ5W08AdsA=
输出: abc
Code
textBox3.ReadOnly = false;
try
{
DESCryptoServiceProvider descsp =
DESCryptoServiceProvider
;
![](/icons/98438byte.gif)
key = Encoding.Unicode.GetBytes(encryptKey);
![](/icons/98438byte.gif)
data = Convert.FromBase64String(textBox2.Text.Trim
);
MemoryStream MStream =
MemoryStream
;
CryptoStream CStream =
CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);
CStream.Write(data, 0, data.Length);
CStream.FlushFinalBlock
;
textBox3.Text = Encoding.Unicode.GetString(MStream.ToArray
);
textBox1.Text = "";
textBox1.ReadOnly = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
10.区别 0, 空
![](/icons/98438zifu.gif)
(1).对于声明后未赋值
![](/icons/98438de.gif)
![](/icons/98438dou.gif)
![](/icons/98438de.gif)
(2).对于声明后未赋值
![](/icons/98438de.gif)
![](/icons/98438zifu.gif)
![](/icons/98438dou.gif)
![](/icons/98438zifu.gif)
(3).Null关键字介绍说明变量不包含有效数据
![](/icons/98438dou.gif)
![](/icons/98438de.gif)
![](/icons/98438dou.gif)
![](/icons/98438de.gif)
![](/icons/98438de.gif)
![](/icons/98438dou2.gif)
(4).Empty关键字表示未
![](/icons/98438chushi.gif)
![](/icons/98438de.gif)
![](/icons/98438de.gif)
![](/icons/98438dou2.gif)
(5).Nothing关键字用于将对象变量从实际对象中分离开来
![](/icons/98438dou2.gif)
补充介绍说明:
![](/icons/98438yi.gif)
![](/icons/98438de.gif)
![](/icons/98438zifu.gif)
![](/icons/98438zifu.gif)
文章来源: http://www.cnblogs.com/ziyiFly/archive/2008/09/17/1292488.html
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