string类与stringBuilder类的笔记
上一篇 / 下一篇 2010-03-29 15:45:54 / 个人分类:.net
~e"ca;^e"\v ~/G%`01,stringBuilder类是动态的,可在原对象上直接修改.而string类则是静态的,要修改就得开僻新的内存空间
1Ov3`(u;q x#~F0f@r8}qis02,stringBuilder类在性能我效率上比string类高效得多51Testing软件测试网Z|6DwLtl"n9h
d+J.V&K4Gt-~WW6p03,使用stringBuilder类需引用system.Text命名空间51Testing软件测试网N!YTP&mC*Ck6x8A#~G
Y3gCQiq9O(Q8S0?pK04,网页中对输入框进行的常用处理51Testing软件测试网f(| F!`#Qps-` o;A@7l
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P.g0 //替代某字符51Testing软件测试网)h:_G3D`
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private void tidai(TextBox tb2)51Testing软件测试网E[%qJ]`
{
eS_:Pn9X$B0 string str = tb2.Text;
t2?*[-h:_+E4S7L0 //string[] newstr =new string[100];51Testing软件测试网os`d%f
string newwstr = str.Replace(" ", " ");
,b[;Qv+B|?!^0 string newstr = newwstr.ToUpper();//转换为大写,ToLower小写
J-`cID$N0Pn0 TextBox1.Text = newstr.ToString();
}51Testing软件测试网Y&~+JqZv|m0V9T
z-CaJMrRc0 //删除指定字符串
5M}%nA1I9l0 private void Delete(TextBox tb2)
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string newstr = " ";
0O'j7zJ1x^1D4@} I0 char[] trimchar ={ '\\', '@' };
ZY7cbiQ\@0 string ldstr = tb2.Text;51Testing软件测试网^/k,A5Bwp
newstr = oldstr.Trim(trimchar);51Testing软件测试网3R:x"?2G1x ];h4L
TextBox1.Text = newstr.ToString();
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H{'?'Q$O+|B0 //删除首尾空格
;H6^%Dw;NCX0 private void DeleteKong(TextBox tb2)51Testing软件测试网Cs_vUY
{
Gt K^7LV:F}0 string newstr = " ";51Testing软件测试网@L2|6N3m
char[] trimchar ={};
Z#XKI0B0 string ldstr = tb2.Text;51Testing软件测试网2D#p(Z
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newstr = oldstr.Trim(trimchar);
{n$O(x:D4u'q1b0 TextBox1.Text = newstr.ToString();
+fscm)n0 }51Testing软件测试网C*P7k*q1OP5p
//判断两个字符串是否相等
w,c7l u5`u%bm0 private void Equal(TextBox tb1, TextBox tb2)