“”(十六进制值 0x1D)是无效的字符

本文介绍了一种在生成XML文件时遇到的加载或保存异常(System.ArgumentException),该异常由XML文件中的低位非打印字符引起。文中提供了具体的处理方法,即通过过滤并替换这些非法字符来解决此问题。

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加载或保存XML时引发的异常.System.ArgumentException: “”(十六进制值 0x1D)是无效的字符。
产生原因是xml文件中包含低位非打印字符造成的
处理方法:在产生xml文件的时候,过滤低位非打印字符

把一个字符串中的 低序位 ASCII 字符 替换成   字符
转换  ASCII  0 - 8  -> -
转换  ASCII 11 - 12 -> -
转换  ASCII 14 - 31 -> -

return System.Text.RegularExpressions.Regex.Replace(HttpUtility.HtmlEncode(str),@"[\x00-\x08]|[\x0B-\x0C]|[\x0E-\x1F]", "");

转载于:https://www.cnblogs.com/rock_chen/archive/2009/03/07/1405433.html

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03-29
#include <reg51.h> #include <absacc.h> #include <math.h> #define COM8255 XBYTE[0x8ff3] #define PA8255 XBYTE[0x8ff0] #define PB8255 XBYTE[0x8ff1] #define AD0809 XBYTE[0xfff8] #define DAC0832 XBYTE[0xefff] #define u8 unsigned char #define u16 unsigned int #define KEY_A 0xBO #define KEY_B 0xB1 #define KEY_C 0xB2 u8 duan[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; u8 wei[4]={0x08,0x04,0x02,0x01}; u8 code SINBUF[256]={0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc, 0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe, 0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea, 0xe8,0xe6,0xe4,0xe3,0xe1,0xde,0xdc,0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c, 0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e, 0x3b,0x39,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,0x12,0x10,0x0f,0x0d,0x0c,0x0b,0x09,0x08,0x07,0x06,0x05,0x04, 0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0c,0x0d,0x0e, 0x10,0x12,0x13,0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,0x38,0x3b,0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57, 0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c}; unsigned char display[4]={0}; unsigned char key=1; unsigned char u,xu; unsigned char wucha=5; unsigned int X=61000; unsigned char triangle=0,square=0,zheng=0; sbit EOC = P2^1; void delay(unsigned char x) { u8 j; while(x--) { for(j=0;j<125;j++); } } void xianshi() { u8 j; for(j=0;j<4;j++) { PA8255=duan[display[j]]; PB8255=~wei[j]; delay(10); } } void keyboard() { u8 temp; temp = P1&0x07; if(temp!=0x07) { delay(10); temp=P1 & 0x07; if(temp!=0x07) { if(temp==KEY_A) { key='A'; } else if(temp==KEY_B) { key='B'; } else if(temp==KEY_C) { key='C'; } while(temp != 0x07) { temp = P1 & 0x07; } } } if(key=='A') display[0]=10; if(key=='B') display[0]=11; if(key=='C') display[0]=12; } void main() { TMOD=0x01; EA=1; EX0=1; IT0=0; TH0=X/256; TL0=X%256; TR0=1; ET0=1; xu =0; COM8255=0x80; AD0809=0; while(1) { keyboard(); xianshi(); } } u8 AD() { AD0809=0; while(EOC==1); while(EOC==0); return AD0809; } void Vshow() interrupt 0 { u8 i,y; u16 k; u = AD0809; EX0=0; if(u != xu) { k=1000000/(25*u+4536); for(i=3;i>=1;i--) { y=k%10; k=k/10; display[i]=y; } }; xu = u; AD(); EX0=1; } void Bshow() interrupt 1 { TR0=0; X=61000-25*u; TH0=X/256; TL0=X%256; if(key==1) { triangle++; if(triangle<128) { DAC0832=triangle; } else if(triangle>=128 && triangle<255) { DAC0832=255-triangle; } else { triangle=0; } } else if(key==2) { square++; if(square<128) { DAC0832=0xff; } else if(square>=128 && square<255) { DAC0832=0x00; } else { square=0; } } else if(key==3) { zheng++; DAC0832=SINBUF[zheng]; if(zheng==255) { zheng=0; } } TR0=1; }能否显示ABC,指出代码中的问题
最新发布
06-27
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