我有一些日期相同的7788ASD，我想分开，只有“a”我想要 [英] I hava some date all of same 7788ASD I want split and only "a" I want

问题描述

private void dataGridView3_CellClick（object sender，DataGridViewCellEventArgs e）

{

connection.Open（）;

try

{

mdr = command.ExecuteReader（）;

if（mdr.Read（））

{

String character = dataGridView3.CurrentRow.Cells [1] .Value.ToString（）;



//现在character有7788ASD我只想要A

// ?????????????????????



}

else

{

MessageBox.Show（bla bla ......）;

}

}

catch（exception ex）

{

MessageBox.Show（ex.Message）;

}

connection.Close（）;

}



我尝试了什么：



i hava一些日期全部相同7788ASD我想拆分而且只有A我想要

解决方案

尝试一个正则表达式：

（？< FirstNumber> \\\）（？< SecondNumber> \\ \\d\ d）（？< Char1>。）（？< Char2>。）（？< char3>。）

将您的输入分成组：两位数，两位数，然后三组一个字符。

然后，您可以将每个组作为单独的对象访问并处理它，而无需进一步拆分。 （将名称替换为字段描述）。

Regex Class [ ^ ]

< blockquote>

引用：

我hava一些日期全部相同的7788ASD我想拆分而只有A我想要

阅读C＃文档怎么样？

String.Substring方法（Int32，Int32）（系统） [ ^ ]

try

 String character = dataGridView3.CurrentRow .Cells [1] .Value.ToString（）; 
 string result =; 
 if（character.Length> = 5）
 result = character.Substring（4,1）; 
 

private void dataGridView3_CellClick(object sender, DataGridViewCellEventArgs e)
{
connection.Open();
try
{
mdr = command.ExecuteReader();
if (mdr.Read())
{
String character = dataGridView3.CurrentRow.Cells[1].Value.ToString();

// now "character" have 7788ASD I want only "A"
//???????????????????????

}
else
{
MessageBox.Show("bla bla......");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
connection.Close();
}

What I have tried:

i hava some date all of same 7788ASD I want split and only "A" i want

解决方案

Try a regex:

(?<FirstNumber>\d\d)(?<SecondNumber>\d\d)(?<Char1>.)(?<Char2>.)(?<Char3>.)

That splits your input into groups: two digits, two digits, then three sets of one character.
You can then access each group as a separate object and process it without having to split it up any further. (Replace the names with descriptions of the fields).
Regex Class[^]

Quote:

i hava some date all of same 7788ASD I want split and only "A" i want

What about reading C# documentation?
String.Substring Method (Int32, Int32) (System)[^]

try

String character =   dataGridView3.CurrentRow.Cells[1].Value.ToString();
           string result = "";
           if (character.Length >= 5)
               result = character.Substring(4, 1);

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