【源码 mvc】【iview源码解析】【内测平台源码】iapplied源码

来源:短线源码公式

1.菜鸟怎么样学习C语言
2.des算法源代码
3.Ubuntu 9.10下安装和使用ffmpeg的详细过程!
4.C#用datagriview控件增加删除行数据,源码并且更新到xml中,源码求代码(急)如图

iapplied源码

菜鸟怎么样学习C语言

       1、源码学习C语言,源码要从入门到精通,源码需要读哪些书(从简单的源码源码 mvc到难的排序,越详细越好,源码最好都能注释下选择这本书的源码理由)?

       入门阶段:还是老谭那本。

       理由:虽然不能说它写得有多好,源码但是源码你现在要做的是入门,要快速的源码掌握c的基本语法,这本书很好理解,源码能够让你在最短的源码时间内大致掌握这门语言的概更。

       第二阶段:《c程序设计语言》(The源码 C Programming Language)和《C语言解惑》(The C puzzle book)

       理由:《the c programming language》号称c语言圣经。其实它也只是源码一本介绍基础语法的书,不做入门教程是因为对于初学者来说,它难度稍大,iview源码解析之所以推荐,是因为它能让你---系统而严密的---把C语言知识构架整理一遍。《c语言解惑》,系统的整理了c语法中容易让你产生迷惑或容易犯错的地方(如a+++++b等),这时候你才算真正开始学习c语言了.(以上两本现在出重印了,应该在书店可以买到)

       第三阶段:《C陷阱与缺陷》(C Traps and Pitfalls)和《高质量c/c++编程指南》

       理由:《c陷阱与缺陷》是让对c的理解有质变得一本书,如如何理解(*(void(*)())0)()等问题,我的感觉是看完这本书让我真正从小菜鸟变成了老菜鸟。《高质量...》,内测平台源码终于有一本国产的了,呵呵,我认为这本书是把你从土匪变成正规军的最好指南,该书涉及编程风格、效率、重载、健壮性等一些列之前很难注意的问题。(以上两本《c陷阱...》已绝版,srs 源码 分析不过网上可以下载到中英文版,《高质量...》本身就是网络书,很容易找到)

       其它推荐书:《c专家编程》《c和指针》

       说实话这两本书我并没有看过(或看完),但有口皆碑,都是经典之作,不过都已经绝版,仔细找找网上有下载的。

       2、framework源码分析有哪些好的C语言练习(越难的越好)?

       对语言本身的练习其实就是你对它的理解,用得多了,注意得多了,自然就ok了。其它思维上的练习主要是算法和数据结构方面的,严老的《数据结构题集(C语言版)》如果你能做完就相当了不起了。

       3、要学精C语言,还要具备哪些条件?

       其实c语言也只是一个工具而已,就像锄头一样,你每天挖地锄田自然就精通它了。只要不是白痴,应该都没有问题。

       4、C语言学完后接下去要学哪些语言好?

       这个我就没有资格回答了,因为除了少量汇编和c++,我大部分只用到了c,不过也许是一脉相承的c++吧。c是面向过程的语言,学习c++面向对象的思想。

       5、各位网友如果在学习计算机语言方面还有一些独到的见解,欢迎提出!

       不是我提出的,不过真的很经典——“天下程序一大抄”,呵呵。

des算法源代码

       des.h文件:

       #ifndef CRYPTOPP_DES_H

       #define CRYPTOPP_DES_H

       #include "cryptlib.h"

       #include "misc.h"

       NAMESPACE_BEGIN(CryptoPP)

       class DES : public BlockTransformation

       {

       public:

       DES(const byte *userKey, CipherDir);

       void ProcessBlock(const byte *inBlock, byte * outBlock) const;

       void ProcessBlock(byte * inoutBlock) const

       { DES::ProcessBlock(inoutBlock, inoutBlock);}

       enum { KEYLENGTH=8, BLOCKSIZE=8};

       unsigned int BlockSize() const { return BLOCKSIZE;}

       protected:

       static const word Spbox[8][];

       SecBlock<word> k;

       };

       class DESEncryption : public DES

       {

       public:

       DESEncryption(const byte * userKey)

       : DES (userKey, ENCRYPTION) { }

       };

       class DESDecryption : public DES

       {

       public:

       DESDecryption(const byte * userKey)

       : DES (userKey, DECRYPTION) { }

       };

       class DES_EDE_Encryption : public BlockTransformation

       {

       public:

       DES_EDE_Encryption(const byte * userKey)

       : e(userKey, ENCRYPTION), d(userKey + DES::KEYLENGTH, DECRYPTION) { }

       void ProcessBlock(const byte *inBlock, byte * outBlock) const;

       void ProcessBlock(byte * inoutBlock) const;

       enum { KEYLENGTH=, BLOCKSIZE=8};

       unsigned int BlockSize() const { return BLOCKSIZE;}

       private:

       DES e, d;

       };

       class DES_EDE_Decryption : public BlockTransformation

       {

       public:

       DES_EDE_Decryption(const byte * userKey)

       : d(userKey, DECRYPTION), e(userKey + DES::KEYLENGTH, ENCRYPTION) { }

       void ProcessBlock(const byte *inBlock, byte * outBlock) const;

       void ProcessBlock(byte * inoutBlock) const;

       enum { KEYLENGTH=, BLOCKSIZE=8};

       unsigned int BlockSize() const { return BLOCKSIZE;}

       private:

       DES d, e;

       };

       class TripleDES_Encryption : public BlockTransformation

       {

       public:

       TripleDES_Encryption(const byte * userKey)

       : e1(userKey, ENCRYPTION), d(userKey + DES::KEYLENGTH, DECRYPTION),

       e2(userKey + 2*DES::KEYLENGTH, ENCRYPTION) { }

       void ProcessBlock(const byte *inBlock, byte * outBlock) const;

       void ProcessBlock(byte * inoutBlock) const;

       enum { KEYLENGTH=, BLOCKSIZE=8};

       unsigned int BlockSize() const { return BLOCKSIZE;}

       private:

       DES e1, d, e2;

       };

       class TripleDES_Decryption : public BlockTransformation

       {

       public:

       TripleDES_Decryption(const byte * userKey)

       : d1(userKey + 2*DES::KEYLENGTH, DECRYPTION), e(userKey + DES::KEYLENGTH, ENCRYPTION),

       d2(userKey, DECRYPTION) { }

       void ProcessBlock(const byte *inBlock, byte * outBlock) const;

       void ProcessBlock(byte * inoutBlock) const;

       enum { KEYLENGTH=, BLOCKSIZE=8};

       unsigned int BlockSize() const { return BLOCKSIZE;}

       private:

       DES d1, e, d2;

       };

       NAMESPACE_END

       #endif

       des.cpp文件:

       // des.cpp - modified by Wei Dai from:

       /*

       * This is a major rewrite of my old public domain DES code written

       * circa , which in turn borrowed heavily from Jim Gillogly's

       * public domain code. I pretty much kept my key scheduling code, but

       * the actual encrypt/decrypt routines are taken from from Richard

       * Outerbridge's DES code as printed in Schneier's "Applied Cryptography."

       *

       * This code is in the public domain. I would appreciate bug reports and

       * enhancements.

       *

       * Phil Karn KA9Q, karn@unix.ka9q.ampr.org, August .

       */

       #include "pch.h"

       #include "misc.h"

       #include "des.h"

       NAMESPACE_BEGIN(CryptoPP)

       /* Tables defined in the Data Encryption Standard documents

       * Three of these tables, the initial permutation, the final

       * permutation and the expansion operator, are regular enough that

       * for speed, we hard-code them. They're here for reference only.

       * Also, the S and P boxes are used by a separate program, gensp.c,

       * to build the combined SP box, Spbox[]. They're also here just

       * for reference.

       */

       #ifdef notdef

       /* initial permutation IP */

       static byte ip[] = {

       , , , , , , , 2,

       , , , , , , , 4,

       , , , , , , , 6,

       , , , , , , , 8,

       , , , , , , 9, 1,

       , , , , , , , 3,

       , , , , , , , 5,

       , , , , , , , 7

       };

       /* final permutation IP^-1 */

       static byte fp[] = {

       , 8, , , , , , ,

       , 7, , , , , , ,

       , 6, , , , , , ,

       , 5, , , , , , ,

       , 4, , , , , , ,

       , 3, , , , , , ,

       , 2, , , , , , ,

       , 1, , 9, , , ,

       };

       /* expansion operation matrix */

       static byte ei[] = {

       , 1, 2, 3, 4, 5,

       4, 5, 6, 7, 8, 9,

       8, 9, , , , ,

       , , , , , ,

       , , , , , ,

       , , , , , ,

       , , , , , ,

       , , , , , 1

       };

       /* The (in)famous S-boxes */

       static byte sbox[8][] = {

       /* S1 */

       , 4, , 1, 2, , , 8, 3, , 6, , 5, 9, 0, 7,

       0, , 7, 4, , 2, , 1, , 6, , , 9, 5, 3, 8,

       4, 1, , 8, , 6, 2, , , , 9, 7, 3, , 5, 0,

       , , 8, 2, 4, 9, 1, 7, 5, , 3, , , 0, 6, ,

       /* S2 */

       , 1, 8, , 6, , 3, 4, 9, 7, 2, , , 0, 5, ,

       3, , 4, 7, , 2, 8, , , 0, 1, , 6, 9, , 5,

       0, , 7, , , 4, , 1, 5, 8, , 6, 9, 3, 2, ,

       , 8, , 1, 3, , 4, 2, , 6, 7, , 0, 5, , 9,

       /* S3 */

       , 0, 9, , 6, 3, , 5, 1, , , 7, , 4, 2, 8,

       , 7, 0, 9, 3, 4, 6, , 2, 8, 5, , , , , 1,

       , 6, 4, 9, 8, , 3, 0, , 1, 2, , 5, , , 7,

       1, , , 0, 6, 9, 8, 7, 4, , , 3, , 5, 2, ,

       /* S4 */

       7, , , 3, 0, 6, 9, , 1, 2, 8, 5, , , 4, ,

       , 8, , 5, 6, , 0, 3, 4, 7, 2, , 1, , , 9,

       , 6, 9, 0, , , 7, , , 1, 3, , 5, 2, 8, 4,

       3, , 0, 6, , 1, , 8, 9, 4, 5, , , 7, 2, ,

       /* S5 */

       2, , 4, 1, 7, , , 6, 8, 5, 3, , , 0, , 9,

       , , 2, , 4, 7, , 1, 5, 0, , , 3, 9, 8, 6,

       4, 2, 1, , , , 7, 8, , 9, , 5, 6, 3, 0, ,

       , 8, , 7, 1, , 2, , 6, , 0, 9, , 4, 5, 3,

       /* S6 */

       , 1, , , 9, 2, 6, 8, 0, , 3, 4, , 7, 5, ,

       , , 4, 2, 7, , 9, 5, 6, 1, , , 0, , 3, 8,

       9, , , 5, 2, 8, , 3, 7, 0, 4, , 1, , , 6,

       4, 3, 2, , 9, 5, , , , , 1, 7, 6, 0, 8, ,

       /* S7 */

       4, , 2, , , 0, 8, , 3, , 9, 7, 5, , 6, 1,

       , 0, , 7, 4, 9, 1, , , 3, 5, , 2, , 8, 6,

       1, 4, , , , 3, 7, , , , 6, 8, 0, 5, 9, 2,

       6, , , 8, 1, 4, , 7, 9, 5, 0, , , 2, 3, ,

       /* S8 */

       , 2, 8, 4, 6, , , 1, , 9, 3, , 5, 0, , 7,

       1, , , 8, , 3, 7, 4, , 5, 6, , 0, , 9, 2,

       7, , 4, 1, 9, , , 2, 0, 6, , , , 3, 5, 8,

       2, 1, , 7, 4, , 8, , , , 9, 0, 3, 5, 6,

       };

       /* -bit permutation function P used on the output of the S-boxes */

       static byte pi[] = {

       , 7, , ,

       , , , ,

       1, , , ,

       5, , , ,

       2, 8, , ,

       , , 3, 9,

       , , , 6,

       , , 4,

       };

       #endif

       /* permuted choice table (key) */

       static const byte pc1[] = {

       , , , , , , 9,

       1, , , , , , ,

       , 2, , , , , ,

       , , 3, , , , ,

       , , , , , , ,

       7, , , , , , ,

       , 6, , , , , ,

       , , 5, , , , 4

       };

       /* number left rotations of pc1 */

       static const byte totrot[] = {

       1,2,4,6,8,,,,,,,,,,,

       };

       /* permuted choice key (table) */

       static const byte pc2[] = {

       , , , , 1, 5,

       3, , , 6, , ,

       , , , 4, , 8,

       , 7, , , , 2,

       , , , , , ,

       , , , , , ,

       , , , , , ,

       , , , , ,

       };

       /* End of DES-defined tables */

       /* bit 0 is left-most in byte */

       static const int bytebit[] = {

       ,,,,,,,

       };

       /* Set key (initialize key schedule array) */

       DES::DES(const byte *key, CipherDir dir)

       : k()

       {

       SecByteBlock buffer(++8);

       byte *const pc1m=buffer; /* place to modify pc1 into */

       byte *const pcr=pc1m+; /* place to rotate pc1 into */

       byte *const ks=pcr+;

       register int i,j,l;

       int m;

       for (j=0; j<; j++) { /* convert pc1 to bits of key */

       l=pc1[j]-1; /* integer bit location */

       m = l & ; /* find bit */

       pc1m[j]=(key[l>>3] & /* find which key byte l is in */

       bytebit[m]) /* and which bit of that byte */

1 : 0; /* and store 1-bit result */

       }

       for (i=0; i<; i++) { /* key chunk for each iteration */

       memset(ks,0,8); /* Clear key schedule */

       for (j=0; j<; j++) /* rotate pc1 the right amount */

       pcr[j] = pc1m[(l=j+totrot[i])<(j<? : ) ? l: l-];

       /* rotate left and right halves independently */

       for (j=0; j<; j++){ /* select bits individually */

       /* check bit that goes to ks[j] */

       if (pcr[pc2[j]-1]){

       /* mask it in if it's there */

       l= j % 6;

       ks[j/6] |= bytebit[l] >> 2;

       }

       }

       /* Now convert to odd/even interleaved form for use in F */

       k[2*i] = ((word)ks[0] << )

       | ((word)ks[2] << )

       | ((word)ks[4] << 8)

       | ((word)ks[6]);

       k[2*i+1] = ((word)ks[1] << )

       | ((word)ks[3] << )

       | ((word)ks[5] << 8)

       | ((word)ks[7]);

       }

       if (dir==DECRYPTION) // reverse key schedule order

       for (i=0; i<; i+=2)

       {

       std::swap(k[i], k[-2-i]);

       std::swap(k[i+1], k[-1-i]);

       }

       }

       /* End of C code common to both versions */

       /* C code only in portable version */

       // Richard Outerbridge's initial permutation algorithm

       /*

       inline void IPERM(word &left, word &right)

       {

       word work;

       work = ((left >> 4) ^ right) & 0x0f0f0f0f;

       right ^= work;

       left ^= work << 4;

       work = ((left >> ) ^ right) & 0xffff;

       right ^= work;

       left ^= work << ;

       work = ((right >> 2) ^ left) & 0x;

       left ^= work;

       right ^= (work << 2);

       work = ((right >> 8) ^ left) & 0xffff;

       left ^= work;

       right ^= (work << 8);

       right = rotl(right, 1);

       work = (left ^ right) & 0xaaaaaaaa;

       left ^= work;

       right ^= work;

       left = rotl(left, 1);

       }

       inline void FPERM(word &left, word &right)

       {

       word work;

       right = rotr(right, 1);

       work = (left ^ right) & 0xaaaaaaaa;

       left ^= work;

       right ^= work;

       left = rotr(left, 1);

       work = ((left >> 8) ^ right) & 0xffff;

       right ^= work;

       left ^= work << 8;

       work = ((left >> 2) ^ right) & 0x;

       right ^= work;

       left ^= work << 2;

       work = ((right >> ) ^ left) & 0xffff;

       left ^= work;

       right ^= work << ;

       work = ((right >> 4) ^ left) & 0x0f0f0f0f;

       left ^= work;

       right ^= work << 4;

       }

       */

       // Wei Dai's modification to Richard Outerbridge's initial permutation

       // algorithm, this one is faster if you have access to rotate instructions

       // (like in MSVC)

       inline void IPERM(word &left, word &right)

       {

       word work;

       right = rotl(right, 4U);

       work = (left ^ right) & 0xf0f0f0f0;

       left ^= work;

       right = rotr(right^work, U);

       work = (left ^ right) & 0xffff;

       left ^= work;

       right = rotr(right^work, U);

       work = (left ^ right) & 0x;

       left ^= work;

       right = rotr(right^work, 6U);

       work = (left ^ right) & 0xffff;

       left ^= work;

       right = rotl(right^work, 9U);

       work = (left ^ right) & 0xaaaaaaaa;

       left = rotl(left^work, 1U);

       right ^= work;

       }

       inline void FPERM(word &left, word &right)

       {

       word work;

       right = rotr(right, 1U);

       work = (left ^ right) & 0xaaaaaaaa;

       right ^= work;

       left = rotr(left^work, 9U);

       work = (left ^ right) & 0xffff;

       right ^= work;

       left = rotl(left^work, 6U);

       work = (left ^ right) & 0x;

       right ^= work;

       left = rotl(left^work, U);

       work = (left ^ right) & 0xffff;

       right ^= work;

       left = rotl(left^work, U);

       work = (left ^ right) & 0xf0f0f0f0;

       right ^= work;

       left = rotr(left^work, 4U);

       }

       // Encrypt or decrypt a block of data in ECB mode

       void DES::ProcessBlock(const byte *inBlock, byte * outBlock) const

       {

       word l,r,work;

       #ifdef IS_LITTLE_ENDIAN

       l = byteReverse(*(word *)inBlock);

       r = byteReverse(*(word *)(inBlock+4));

       #else

       l = *(word *)inBlock;

       r = *(word *)(inBlock+4);

       #endif

       IPERM(l,r);

       const word *kptr=k;

       for (unsigned i=0; i<8; i++)

       {

       work = rotr(r, 4U) ^ kptr[4*i+0];

       l ^= Spbox[6][(work) & 0x3f]

       ^ Spbox[4][(work >> 8) & 0x3f]

       ^ Spbox[2][(work >> ) & 0x3f]

       ^ Spbox[0][(work >> ) & 0x3f];

       work = r ^ kptr[4*i+1];

       l ^= Spbox[7][(work) & 0x3f]

       ^ Spbox[5][(work >> 8) & 0x3f]

       ^ Spbox[3][(work >> ) & 0x3f]

       ^ Spbox[1][(work >> ) & 0x3f];

       work = rotr(l, 4U) ^ kptr[4*i+2];

       r ^= Spbox[6][(work) & 0x3f]

       ^ Spbox[4][(work >> 8) & 0x3f]

       ^ Spbox[2][(work >> ) & 0x3f]

       ^ Spbox[0][(work >> ) & 0x3f];

       work = l ^ kptr[4*i+3];

       r ^= Spbox[7][(work) & 0x3f]

       ^ Spbox[5][(work >> 8) & 0x3f]

       ^ Spbox[3][(work >> ) & 0x3f]

       ^ Spbox[1][(work >> ) & 0x3f];

       }

       FPERM(l,r);

       #ifdef IS_LITTLE_ENDIAN

       *(word *)outBlock = byteReverse(r);

       *(word *)(outBlock+4) = byteReverse(l);

       #else

       *(word *)outBlock = r;

       *(word *)(outBlock+4) = l;

       #endif

       }

       void DES_EDE_Encryption::ProcessBlock(byte *inoutBlock) const

       {

       e.ProcessBlock(inoutBlock);

       d.ProcessBlock(inoutBlock);

       e.ProcessBlock(inoutBlock);

       }

       void DES_EDE_Encryption::ProcessBlock(const byte *inBlock, byte *outBlock) const

       {

       e.ProcessBlock(inBlock, outBlock);

       d.ProcessBlock(outBlock);

       e.ProcessBlock(outBlock);

       }

       void DES_EDE_Decryption::ProcessBlock(byte *inoutBlock) const

       {

       d.ProcessBlock(inoutBlock);

       e.ProcessBlock(inoutBlock);

       d.ProcessBlock(inoutBlock);

       }

       void DES_EDE_Decryption::ProcessBlock(const byte *inBlock, byte *outBlock) const

       {

       d.ProcessBlock(inBlock, outBlock);

       e.ProcessBlock(outBlock);

       d.ProcessBlock(outBlock);

       }

       void TripleDES_Encryption::ProcessBlock(byte *inoutBlock) const

       {

       e1.ProcessBlock(inoutBlock);

       d.ProcessBlock(inoutBlock);

       e2.ProcessBlock(inoutBlock);

       }

       void TripleDES_Encryption::ProcessBlock(const byte *inBlock, byte *outBlock) const

       {

       e1.ProcessBlock(inBlock, outBlock);

       d.ProcessBlock(outBlock);

       e2.ProcessBlock(outBlock);

       }

       void TripleDES_Decryption::ProcessBlock(byte *inoutBlock) const

       {

       d1.ProcessBlock(inoutBlock);

       e.ProcessBlock(inoutBlock);

       d2.ProcessBlock(inoutBlock);

       }

       void TripleDES_Decryption::ProcessBlock(const byte *inBlock, byte *outBlock) const

       {

       d1.ProcessBlock(inBlock, outBlock);

       e.ProcessBlock(outBlock);

       d2.ProcessBlock(outBlock);

       }

       NAMESPACE_END

Ubuntu 9.下安装和使用ffmpeg的详细过程!

       ffmpeg的编译、安装及使用(for x,for arm)

       /iminway/blog/item/bda2db4ecedb2def1.html

       æœ€æ–°çš„ffmpeg可以通过svn下载,SVN辅助的软件有:

       SubVersion,从 /modules/mydownloads/,pile --cc=arm-linux-gcc --arch=arm --enable-gpl --disable-strip --disable-network --disable-ipv6 --disable-vhook --disable-audio-beos --disable-audio-oss --disable-mpegaudio-hp --enable-pthreads --enable-small --disable-parsers --disable-debug

       #make

       #make install

       x上的ldconfig不能在arm上运行,arm上的ldconfig工具是在建立交叉编译器时,编译glibc是产生的,可以拷贝到arm-linux中。

       (4) 本文大部分内容来自网络,其中xvid,x的库,我亲手安装过,ffmpeg的配置编译for x的简易配置,for arm,我亲手配置编译过,并在x,arm上可用,编译配置都是采用静态库。

       ffmpeg作为媒体文件处理软件,基本用法如下:

       ffmpeg -i INPUTfile [OPTI

       æ–‡ç« å‡ºå¤„:DIY部落(/course/6_system/linux/Linuxjs//.html)

C#用datagriview控件增加删除行数据,并且更新到xml中,求代码(急)如图

       完全按你的要求写的,供参考:

       前提是XML文件已创建好,在窗体里选择该XML文件,再行操作:

       窗体:

 //选择XML按钮

               private void btnXML_Click(object sender, EventArgs e)

               {

                   DataTable dt = new DataTable();

                   OpenFileDialog xmlFile = new OpenFileDialog();

                   xmlFile.Filter = "*.xml|";

                   xmlFile.Title = "请选择xml文件";

                   if (xmlFile.ShowDialog() == DialogResult.OK)

                   {

                       this.txtPath.Text = xmlFile.FileName;//在textBox1控件中显示选择的路径

                       dt=GetXML(this.txtPath.Text);

                   }

                   if(!dt.Equals(null)&&dt.Rows.Count>0)

                   LoadData(dt, dgvXML);//加载到窗体中

               }

               //保存按钮

               private void button1_Click(object sender, EventArgs e)

               {

                   int n = SaveDgv();

                   if (n > 0)

                   {

                       MessageBox.Show("保存成功!");

                       DataTable dt = new DataTable();

                       dt = GetXML(this.txtPath.Text);

                       LoadData(dt, dgvXML);//刷新加载

                   }

                   else

                   {

                       MessageBox.Show("保存失败!");

                       DataTable dt = new DataTable();

                       dt = GetXML(this.txtPath.Text);

                       LoadData(dt, dgvXML);//刷新加载

                   }

               }

               //删除按钮

               private void btnDelete_Click(object sender, EventArgs e)

               {

                   int n = 0;//判断是否删除

                   for (int i = 0; i < dgvXML.SelectedRows.Count; i++)

                   {

                       string id = dgvXML.SelectedRows[i].Cells[0].Value.ToString();

                       XmlDocument doc = new XmlDocument();

                       doc.Load(this.txtPath.Text);

                       XmlNodeList nod = doc.DocumentElement.ChildNodes;

                       XmlNode root = doc.DocumentElement;

                       foreach (XmlNode peo in nod)

                       {

                           if (XmlNode.Equals(peo.SelectSingleNode("ID").InnerText, id))

                           {

                               root.RemoveChild(peo);//从根节点删除该ID的PERSON

                               doc.Save(this.txtPath.Text);

                               n++;

                           }

                       }

                   }

                   if (n > 0)

                   {

                       DataTable dt = new DataTable();

                       dt = GetXML(this.txtPath.Text);

                       LoadData(dt, dgvXML);//刷新加载

                       MessageBox.Show("删除成功!");

                   }

                   else

                   {

                       MessageBox.Show("删除失败!");

                   }

                   

               }

               // DataGridView中加载数据

               private void LoadData(DataTable dt, DataGridView dgv)

               {

                   dgv.Rows.Clear();//datagridview清空数据

                   if (dt != null && dt.Rows.Count > 0)

                   {

                       dgv.Rows.Add(dt.Rows.Count);

                       for (int i = 0; i < dt.Rows.Count; i++)

                       {

                           for (int k = 0; k < dt.Columns.Count; k++)

                           {

                               dgv.Rows[i].Cells[k].Value = dt.Rows[i][k].ToString();//赋值

                           }

                       }

                   }

               }

               //datagridview添加行号

               private void dataGridView1_RowStateChanged(object sender, DataGridViewRowStateChangedEventArgs e)

               {

                   e.Row.HeaderCell.Value = (e.Row.Index + 1).ToString();

               }

               //解析XML生成DATATABLE

               private List<string> IDList = new List<string>();//用来记录已有的ID,以在修改时判断是否新增

               private DataTable GetXML(string path)

               {

                   DataTable dt = new DataTable();

                   dt.Columns.Add("ID");

                   dt.Columns.Add("NAME");

                   dt.Columns.Add("SEX");

                   dt.Columns.Add("PHONE");

                   XmlDocument doc = new XmlDocument();

                   doc.Load(path);

                   XmlNodeList nod = doc.DocumentElement.ChildNodes;

                   foreach (XmlNode peo in nod)

                   {

                       XmlNodeList pe = peo.ChildNodes;

                       DataRow row = dt.NewRow();

                       foreach (XmlNode p in pe)

                       {

                           if (p.Name == "ID")

                           {

                               row["ID"] = p.InnerText.ToString();

                               IDList.Add(p.InnerText.ToString());//添加ID记录,以在修改时判断是否新增

                           }

                           if (p.Name == "NAME")

                           {

                               row["NAME"] = p.InnerText.ToString();

                           }

                           if (p.Name == "SEX")

                           {

                               row["SEX"] = p.InnerText.ToString();

                           }

                           if (p.Name == "PHONE")

                           {

                               row["PHONE"] = p.InnerText.ToString();

                           }

                       }

                       dt.Rows.Add(row);

                   }

                   return dt;

               }

               //修改dgv数据后保存到XML文件

               private int SaveDgv()

               {

                   int n = 0;

                   for (int i = 0; i < dgvXML.Rows.Count-1; i++)

                   {

                       XmlDocument doc = new XmlDocument();

                       doc.Load(this.txtPath.Text);

                       XmlNodeList nod = doc.DocumentElement.ChildNodes;

                       string id = dgvXML.Rows[i].Cells[0].Value.ToString();

                       if (IDList.Contains(id)) //如果是已有的ID,则修改

                       {

                           foreach (XmlNode peo in nod)

                           {

                               if (XmlNode.Equals(peo.SelectSingleNode("ID").InnerText, id))

                               {

                                   peo.SelectSingleNode("NAME").InnerText = dgvXML.Rows[i].Cells[1].Value.ToString();//赋值姓名

                                   peo.SelectSingleNode("SEX").InnerText = dgvXML.Rows[i].Cells[2].Value.ToString();//赋值性别

                                   peo.SelectSingleNode("PHONE").InnerText = dgvXML.Rows[i].Cells[3].Value.ToString();//赋值电话

                                   doc.Save(this.txtPath.Text);

                                   n++;

                                   break;//当找到该ID记录并修改后,跳出循环

                               }

                           }

                       }

                       else //否则为新增

                       {

                           XmlNode root = doc.DocumentElement;

                           XmlElement PERSON = doc.CreateElement("PERSON");

                           XmlElement ID = doc.CreateElement("ID");

                           ID.InnerText = id;//赋值id

                           XmlElement NAME = doc.CreateElement("NAME");

                           NAME.InnerText = dgvXML.Rows[i].Cells[1].Value.ToString();//赋值姓名

                           XmlElement SEX = doc.CreateElement("SEX");

                           SEX.InnerText = dgvXML.Rows[i].Cells[2].Value.ToString();//赋值性别

                           XmlElement PHONE = doc.CreateElement("PHONE");

                           PHONE.InnerText = dgvXML.Rows[i].Cells[3].Value.ToString();//赋值电话

                           PERSON.AppendChild(ID);

                           PERSON.AppendChild(NAME);

                           PERSON.AppendChild(SEX);

                           PERSON.AppendChild(PHONE);

                           root.AppendChild(PERSON);

                           doc.Save(this.txtPath.Text);//保存

                           n++;

                       }

                   }

                   return n;

               }

       XML文件:

       <?xml version="1.0" standalone="yes"?>

       <List>

         <PERSON>

           <ID></ID>

           <NAME>测一</NAME>

           <SEX>男男</SEX>

           <PHONE></PHONE>

         </PERSON>

         <PERSON>

           <ID></ID>

           <NAME>再二</NAME>

           <SEX>女女</SEX>

           <PHONE></PHONE>

         </PERSON>

         <PERSON>

           <ID></ID>

           <NAME>张三</NAME>

           <SEX>男男</SEX>

           <PHONE></PHONE>

         </PERSON>

         <PERSON>

           <ID></ID>

           <NAME>王五</NAME>

           <SEX>女女</SEX>

           <PHONE></PHONE>

         </PERSON>

       </List>

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