如何从该部分删除键和值？ [英] How to remove key and values from the section?

问题描述

大家好，



我有xx.txt文件，里面有几个部分，每个部分都包含一些键和值。



我想删除指定部分下的所有键和值。删除数据（键和值）后，我必须在指定部分下添加新的键和值。



删除第1部分下的键和值

[第1节]

ask = ok

int = 123



后：

[第1节]

string = xxxx

char = cccc



请帮帮我在这个。



提前谢谢......

Hi All,

I have xx.txt file with few sections and each section consists of some keys and values.

I want remove all keys and values under a specified section. After removing the data (keys and values) I have to add new keys and values under the "specified section".

before removing keys and values under section1
[Section1]
ask=ok
int=123

After:
[Section1]
string=xxxx
char=cccc

Please help me on this.

Thanks in advance...

推荐答案

你可以试试这样做



使用原生方法读取和写入整个部分。

You can try to do it this way

Use the native methods for reading and writing a whole section.

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
static extern uint GetPrivateProfileSection(string lpAppName, IntPtr lpReturnedString, uint nSize, string lpFileName);

[DllImport("kernel32.dll")]
static extern bool WritePrivateProfileSection(string lpAppName, string lpString, string lpFileName);

这是您阅读数据的方式：

This is how you read the data:

uint MAX_BUFFER = 32767;
IntPtr pReturned = Marshal.AllocCoTaskMem((int)MAX_BUFFER * sizeof(char));
uint bytesReturned = GetPrivateProfileSection("section1", 
                       pReturnedString, MAX_BUFFER, "test.ini");

string returned = Marshal.PtrToStringAuto(pReturned, 
                     (int)(bytesReturned - 1));
string[] section = returned.Split('\0');
// Do what you like with these values

这就是你编写数据的方式：

And this is how you write the data:

StringBuilder sbOutput = new StringBuilder();
sbOutput.Append("string=xxxx");
sbOutput.Append('\0');
sbOutput.Append("char=cccc");
WritePrivateProfileSection("section1", sbOutput.ToString(), "test.ini");

该部分现已更新新钥匙。





那么如果你应该这样做是另一个问题。

The section is now updated with the new keys.


Then if you should do this is another question all together.

如果您转到将配置详细信息存储为xml，则可以使用 ConfigurationManager [ ^ ]用于解析文件中配置节的类。

If you move over to storing configuration details as xml, you can use the ConfigurationManager[^] class to parse configuration sections in a file.

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