用C#写一个Excel转Txt的小工具
在游戏制作过程中，策划通常喜欢用EXCEL进行数据编辑。但是直接读取EXCEL文档对于程序来说并不是件有效率的工作。通常我们是现将EXCEL保存成TXT或者XML文档，再进行处理。
下面的程序就是用C#编写的批量将一个目录下（包括子目录）的所有EXCEL文件转换为TXT文档的小工具。为了使TXT文档相对美观做了一些处理（按列对齐）。
完整代码：http://pan.baidu.com/s/1o6oKSH0
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Data.SqlTypes;
using Microsoft.Office.Core;
using Excel = Microsoft.Office.Interop.Excel;
namespace excel2txt
{
class Program
{
static bool _isVerbose = false;
static bool _isAllian = false;
// 获得字段的实际最大长度
static int GetMaxLength(DataTable dt, string captionName)
{
DataColumn maxLengthColumn = new DataColumn();
maxLengthColumn.ColumnName = "MaxLength";
maxLengthColumn.Expression = String.Format("len(convert({0},'System.String'))", captionName);
dt.Columns.Add(maxLengthColumn);
object maxLength = dt.Compute("max(MaxLength)", "true");
if (maxLength == DBNull.Value)
{
return 0;
}
dt.Columns.Remove(maxLengthColumn);
return Convert.ToInt32(maxLength);
}
static void convertExcelToTxt(string inputFile, string outputPath)
{
if (Path.GetExtension(inputFile) != ".xls" && Path.GetExtension(inputFile) != ".xlsx")
{
return;
}
if(!Directory.Exists(outputPath))
{
Directory.CreateDirectory(outputPath);
}
string newFileNameNoExt = Path.GetFileNameWithoutExtension(inputFile);
string newFileNoExt = outputPath + "\\" + newFileNameNoExt;
string newFile = newFileNoExt + ".txt";
Console.WriteLine("Convert file[{0}] to [{1}]", inputFile, newFile);
var conn = new OleDbConnection();
conn.ConnectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;" +
@"Data Source={0}" +
";Extended Properties=\"Excel 12.0 Xml;HDR=No;IMEX=1\"", inputFile);
conn.Open();
DataTable sheetTb = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach (DataRow sheet in sheetTb.Rows)
{
string tableName = sheet["TABLE_NAME"].ToString();
string sql = String.Format("select * from [{0}]", tableName);
OleDbDataAdapter da = new OleDbDataAdapter(sql, conn);
var ds = new DataSet();
da.Fill(ds);
var tb1 = ds.Tables[0];
if (tb1.Rows.Count == 0)
{
continue; // 空表
}
if ( tb1.Rows.Count == 1 && tb1.Columns.Count == 1)
{
if (tb1.Rows[0][0] == DBNull.Value)
{
continue; // 空表
}
}
FileStream fs = new FileStream(newFileNoExt + "_" + tableName.Trim('$') + ".txt", FileMode.OpenOrCreate);
StreamWriter sw = new StreamWriter(fs);
int[] colMaxLen = new int[tb1.Columns.Count];
if (_isAllian)
{
for (int i = 0; i < tb1.Columns.Count; ++i)
{
colMaxLen[i] = 0;
for (int j = 0; j < tb1.Rows.Count; ++j)
{
string s = tb1.Rows[j][i].ToString();
int len = System.Text.Encoding.Default.GetBytes(s).Length;
if (len > colMaxLen[i])
{
colMaxLen[i] = len;
}
}
}
}
foreach (DataRow row in tb1.Rows)
{
for (int j = 0; j < tb1.Columns.Count; ++j)
{
DataColumn col = tb1.Columns[j];
string content = row[j].ToString();
bool hasYinhao = false;
if (-1 != content.IndexOf("\r") || -1 != content.IndexOf("\n"))
{
hasYinhao = true;
}
string fmt;
if (_isAllian)
{
int realLen = colMaxLen[j] - (System.Text.Encoding.Default.GetBytes(content).Length - content.Length);
// "{0,-10}"\t
fmt = String.Format("{0}{1}0,-{2}{3}{4}{5}", hasYinhao ? "\"" : "",
"{", realLen, "}", hasYinhao ? "\"" : "", j + 1 == tb1.Columns.Count ? "" : "\t");
}
else
{
// "{0}"\t
fmt = String.Format("{0}{1}0{2}{3}{4}", hasYinhao ? "\"" : "",
"{", "}", hasYinhao ? "\"" : "", j + 1 == tb1.Columns.Count ? "" : "\t");
}
sw.Write(fmt, row[j]);
if (_isVerbose)
{
Console.Write(fmt, row[j]);
}
}
sw.WriteLine();
if (_isVerbose)
{
Console.WriteLine();
}
}
sw.Close();
}
conn.Close();
}
static void loopDir(string inputDir, string outDir)
{
DirectoryInfo di = new DirectoryInfo(inputDir);
var files = di.GetFiles();
foreach (var file in files)
{
string srcPath = file.FullName;
string dstPath = outDir;
// Console.WriteLine(srcPath + " " + dstPath);
convertExcelToTxt(srcPath, dstPath);
}
var infos = di.GetDirectories();
foreach(var info in infos)
{
string srcPath = info.FullName;
string dstPath = outDir + "\\" + info.Name;
loopDir(srcPath, dstPath);
}
}
static int Main(string[] args)
{
if(args.Length < 1)
{
Console.WriteLine("Help: \r\n" +
" excel_convert InputDir [OutputDir] /v /a\r\n" +
" InputDir 必选，输入目录。 将遍历此目录下的所有.xls 和.xlsx文件进行转换 \r\n" +
" Output 可选，输出目录。 如果没有使用和InputDir同一目录 \r\n" +
" /v 可选，显示转换信息。\r\n" +
" /a 可选，对齐列打印。\r\n");
return -1;
}
string inputDir = args[0];
if (!Directory.Exists(inputDir))
{
Console.WriteLine("No input directory exist, {0}", inputDir);
return -1;
}
string outputPath;
if (args.Length > 1)
{
outputPath = args[1];
}
else
{
outputPath = inputDir;
}
for (int i = 2; i < args.Length; ++i )
{
string verbose = args[i];
verbose = verbose.ToLower();
if (verbose == "/v")
{
_isVerbose = true;
}
if (verbose == "/a")
{
_isAllian = true;
}
}
loopDir(inputDir, outputPath);
return 0;
}
}
}
参考：
1. 【C#读取Excel 2010】,汪宇杰
2. 【C#格式化字符串中转义大括号“{}”】, ^_^肥仔John
3. 【浅谈 DataSet 的用法】
4. 【C#解决汉字长度判断的问题】,米猫腻
5. 【处理 Null 值】
6. 【通过ADO连接到EXCEL后如何获取EXCEL里的sheet名】
7. 【ADO.NET读取Excel数据时出现有的数据读出来为空】