用stringreader的read方法,读制定长度的字符。
比如:
Dim a As String = "asdfjkkkkaskdljjasdkfj askldjfka sljdfklasdjfklasdjf" & vbCrLf & "asdf asdf asdfasd f"
Dim b As New System.IO.StringReader(a)
Dim buffer(26) As Char
While b.Read(buffer, 0, 26)
'
End While
比如:
Dim a As String = "asdfjkkkkaskdljjasdkfj askldjfka sljdfklasdjfklasdjf" & vbCrLf & "asdf asdf asdfasd f"
Dim b As New System.IO.StringReader(a)
Dim buffer(26) As Char
While b.Read(buffer, 0, 26)
'
End While
StreamReader streamreaderobj;
String file_name;
file_name="F:\\test.txt";
//定义一个变量来保存从文件中读出的内容
if(File.Exists(file_name))
{
char[] test =new char[8];
streamreaderobj = File.OpenText(file_name) ;
int result=streamreaderobj.Read(test,0,8);
string i="";
if(result>0)
{
i=i + test[0].ToString();
}
}