在我的CSV文件中，我有一个包含字符串和日期时间类型的列。这是我的CSV文件中包含此数据的第5列（TUI 01/01/01）。 我对空格中的逗号应用了一些更改，以便在两个不同的列（TUI，01 / 01/01）中分隔此值。但是，这些更改会影响其值之间有空格的其他列数据。 我只是想应用这些更改只影响第五列。
任何建议都会非常值得赞赏。
$("#description").height()答案 0 :(得分：0)
好的，你明确地将替换应用于整个文件，这就是它影响所有列的原因，尝试另一种方式：
-loop每一行
-in每个循环使用逗号分割元素
UIImagePicker - 然后特别将其应用于第5栏：
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
}
- 仅对第5个元素施加效果
- 将它组合起来并按照你的要求获得整行
答案 1 :(得分：0)
您当前的方式影响整行（.Select(line => line.Replace(' ', ','))），而不仅仅是行上的第5个字段。这是另一种方式。
选项1
public Form1()
{
InitializeComponent();
ReWriteFile(@"M:\StackOverflowQuestionsAndAnswers\38873875\38873875\testdata.csv");//call the method
}
public void ReWriteFile(string fileName)
{
using (StreamWriter sw = new StreamWriter(@"M:\StackOverflowQuestionsAndAnswers\38873875\38873875\testdata_new.csv"))
{
string currentLine = string.Empty;
using (StreamReader sr = new StreamReader(fileName))//
{
while ((currentLine = sr.ReadLine()) != null)//while there are lines to read
{
string[] fielded = currentLine.Split(',');//split your fields into an array
fielded[4] = fielded[4].Replace(" ", ",");//replace the space in position 4(field 5) of your array
sw.WriteLine(string.Join(",", fielded));//write the line in the new file
}
}
}
}
我的起始数据是这样的（列数不匹配，但它没有保留任何工作，因为它应该用于此问题的目的）：
col1,col2,col3,col4,col5,col6
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
经过这个方法之后就变成了这个：
col1,col2,col3,col4,col5,col6
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
在这里阅读了你的问题之后 how to display the column names on my csv file 我意识到你必须跳过第一行是有充分理由的，所以我更新了我的代码并解决了你的问题＆＃39; s问题同时存在。
此选项按原样写入标题记录
/// <summary>
/// In this method I use the lineCounter as my position tracker to know which line I'm readin at the time
/// </summary>
/// <param name="fileName"></param>
public void ReWriteFileDontAffectFirstRow(string fileName)
{
int lineCounter = 0;//lets make our own position tracker
using (StreamWriter sw = new StreamWriter(@"M:\StackOverflowQuestionsAndAnswers\38873875\38873875\testdata_new2.csv"))
{
string currentLine = string.Empty;
using (StreamReader sr = new StreamReader(fileName))
{
while ((currentLine = sr.ReadLine()) != null)//while there are lines to read
{
if (lineCounter != 0)
{
//If it's not the first line
string[] fielded = currentLine.Split(',');//split your fields into an array
fielded[4] = fielded[4].Replace(" ", ",");//replace the space in position 4(field 5) of your array
sw.WriteLine(string.Join(",", fielded));//write the line in the new file
}
else
{
//If it's the first line
sw.WriteLine(currentLine);//Write the line as-is
}
lineCounter++;
}
}
}
}
原始数据是这样的（列数不匹配，但它不会使任何事情无法正常工作）
col 1,col 2,col 3,col 4,col 5,col 6
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data,col 6 data
完成方法后的数据
col 1,col 2,col 3,col 4,col 5,col 6
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data,col 6 data
此选项会在标题记录中添加一个字段
public void ReWriteFileAdjustHeaderRecordToo(string fileName)
{
int lineCounter = 0;//lets make our own position tracker
using (StreamWriter sw = new StreamWriter(@"M:\StackOverflowQuestionsAndAnswers\38873875\38873875\testdata_new3.csv"))
{
string currentLine = string.Empty;
using (StreamReader sr = new StreamReader(fileName))
{
while ((currentLine = sr.ReadLine()) != null)//while there are lines to read
{
List<string> fielded = new List<string>(currentLine.Split(','));//splits your fields into a list of fields. This is no longer a string[]. Its a list so we can "inject" the new column in the header record.
if (lineCounter != 0)
{
//If it's not the first line
fielded[4] = fielded[4].Replace(" ", ",");//replace the space in position 4(field 5) of your array
sw.WriteLine(string.Join(",", fielded));//write the line in the new file
}
else
{
//If it's the first line
fielded.Insert(4, "new inserted col");//inject the new column into the list
sw.WriteLine(string.Join(",", fielded));//write the line in the new file
}
lineCounter++;
}
}
}
}
启动数据（此数据具有正确的起始列数）
col 1,col 2,col 3,col 4,col 5,col 6
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI 01/01/01,col 5 data
方法后的数据
col 1,col 2,col 3,col 4,new inserted col,col 5,col 6
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data
col 1 data,col 2 data,col 3 data,col 4 data,TUI,01/01/01,col 5 data