Question

我想阅读具有以下条件的.dat文件： -

First name offset                       21
First name format                       ASCIIz 15 chars + \0
Middle initials offset                  37
ID offset                               -8
ID format/length                        Unsigned int (4 bytes)

请帮助我在c＃中对此问题进行排序。

提前致谢。

Gurpreet

.dat文件

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Answer 1

以下是如何使用BinaryReader实现此目的的教程：

http://dotnetperls.com/binaryreader

Answer 2

您可以使用Jet OleDB来查询.dat文件：

var query = "select * from file.dat";
var connection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\file.dat;Extended Properties=\"text;HDR=NO;FMT=FixedLength\"");

请看这个链接：

代码项目。 Read Text File (txt, csv, log, tab, fixed length)

并查看以下内容：

Answer 3

如上所述，请查看BinaryReader

//Example...
BinaryReader reader = new BinaryReader(stream);
string name = Encoding.ASCII.GetString(reader.ReadBytes(8));
int number = reader.ReadInt32();

Answer 4

my .dat file content - " €U§µPÕ „ÕG¬u " click here to see the content of my .dat file in Notepad and hexa editor

            string fileName = @"W:\yourfilename.dat";
            //Read the binary file as byte array            
            byte[] bHex = File.ReadAllBytes(fileName);

            //Create string builder for extracting the HEX values
            StringBuilder st = new StringBuilder();

            //initialize the int for 0
            int i = 0;
            // check it worked

            //Reverse the HEX array for readability
            foreach (char c in bHex.Reverse())
            {
                i++;
                // 12 to 21 byte in the reverse order for interseted value in ticks"

                if (i > 12 && i < 21)
                    st.Append(Convert.ToInt32(c).ToString("X2"));

            }

            // Convert HEX to Deciamal
            long Output = Convert.ToInt64(st.ToString(), 16);

            //Convert ticks to date time
            DateTime dt = new DateTime(Output);

            //Write the output date to console
            Console.Write(dt);

最终将二进制内容解密为数据时间。 final output of the program

在c＃中读取.dat文件

4 个答案: