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在园子里看过很多文章,关于设计模式,关于架构等等,我在这里谈谈一些软件的功能,为什么需要这样的功能。

我前段时间写了一个TXT与EXCEL为什么要互相转换的功能,可能有人会问,这样的功能有什么作用?是的,这小功能在软件开发上有很大的作用的。txt文本是没有格式的,但是excel文档是有格式的,将没有格式的东西转换为有格式的东西,可以方便别人阅读,除此之外,很多软件的服务端传给客户端的东西是没有格式的东西,就是一个字符串,客户端接收到这个字符串,如何格式化,变成我们需要的东西,比如说excel文档。反之,有个excel文档,也要将它变成字符串才能顺利地发给服务端,或者发给调用者。当然,可能有人会说传字符串的方式非常落后,现在都有webservice这个标准化的东西,webservice是有格式的,而且很好传输与解析,但是如果你后台是用C语言写,或者是更低级语言编写的,并没有类似于webservice的东西,那就只能传输字符流了。其实webservice传输的也是wsdl的文本,它本身也是一堆字符而已,只不过是通过一些组件变成我们需要的东西,例如类。webservice只是一个通用的标准,也可以制定属于自己的标准。
EXECL转换TXT:
首先,需要读取EXCEL文档,读取excel文档可以通过ADO.NET的Connection。
- ///
 /// 获取excel - /// ///
 - ///
 - privateOleDbConnection getCon(stringexcelPath){
 - try{stringstrConn = "Provider=Microsoft.Jet.OLEDB.4.0;"+
 - "Data Source="+ excelPath + ";"+ "Extended Properties=Excel 8.0;";
 - OleDbConnection conn = newOleDbConnection(strConn);conn.Open();returnconn;}
 - catch(Exception ex){
 - thrownewArgumentException("打开excel失败", ex.Message);}}
 
然后,需要读取excel文档的每一页,与读取excel的内容
- ///
 /// 获取excel页 - /// ///
 - ///
 publicstring[] - getSheets(stringexcelPath){OleDbConnection conn = getCon(excelPath);
 - try{DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, newobject[] {
 - null, null, null, "Table"});
 - string[] strTableNames = newstring[dtSheetName.Rows.Count];
 - inti = 0;for(intk = 0; k
 - //把有下划线的excel页去掉
 - if(!dtSheetName.Rows[k]["TABLE_NAME"].ToString().Contains("_")){strTableNames[i] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();i++;}}
 - returnstrTableNames;} catch(Exception ex){ throwex; }finally{ conn.Close(); }}
 - ///
 /// 获取excel的数据 - /// ///
 - ///
 - ///
 publicDataTable GetExcelDB(stringexcelPath,stringsheetName){OleDbConnection conn = getCon(excelPath); - try{DataTable dt = newDataTable();OleDbDataAdapter myada = null;
 - stringstrExcel = "select * from ["+ sheetName + "]";myada = newOleDbDataAdapter(strExcel, conn);
 - myada.Fill(dt);returndt;}catch(Exception ex){ throwex; }finally{ conn.Close(); }}
 
***,生成TXT文本,因为txt文本是没有格式的,因此我们需要制定一些标准,我设定每个单元格的长度都为30个字节,excel的每一行对应txt的一行。如果单元格的长度是不一样的,可以制定一个list。有了标准,这样在txt转excel是才能成功。这里需要注意一点,中文字符与英文字符的节长度是不一样的,中文占两个字节,而英文是占1个字节,因此在转换的时候需要多做一些工作。
- ///
 - /// 生成txt
 - ///
 - ///
 - ///
 - privatevoidbtnGenerate_Click(objectsender, EventArgs e){
 - if(txtExcelPath.Text.Trim() == ""){MessageBox.Show("请导入excel");
 - return;}
 - if(cboSheet.Text.Trim() == ""){MessageBox.Show("没有存在的excel页");
 - return;}stringcolName = "";stringrowText = "";
 - StringBuilder strbui = newStringBuilder();
 - try{DataTable dt = GetExcelData.ExcelObj.GetExcelDB(txtExcelPath.Text.Trim(), cboSheet.Text.Trim());
 - for(inti = 0; i
 - byte[] byte_len = Encoding.Default.GetBytes(tempName);
 - if(byte_len.Length <30){intk = 30 - byte_len.Length;for(intt = k; t >0; t--){tempName += " ";}}
 - else{byte[] CutStr_Bytes1 = newbyte[30];
 - Array.Copy(byte_len, 0, CutStr_Bytes1, 0, 30);
 - tempName = myEncoding.GetString(CutStr_Bytes1);}colName += tempName; }
 - for(inti = 0; i
 - for(intj = 0; j
 - stringtempName = dt.Rows[i][j].ToString();byte[] byte_len = Encoding.Default.GetBytes(tempName);
 - if(byte_len.Length <30){intk = 30 - byte_len.Length;for(intt = k; t >0; t--){tempName += " ";}}
 - else{byte[] CutStr_Bytes1 = newbyte[30];
 - Array.Copy(byte_len, 0, CutStr_Bytes1, 0, 30);
 - tempName = myEncoding.GetString(CutStr_Bytes1);}
 - strbui.Append(tempName);}strbui.Append(" ");}rowText = strbui.ToString(); }
 - catch(Exception ex){MessageBox.Show(ex.Message);}
 - try{SaveFileDialog saveFileDialog = newSaveFileDialog();
 - saveFileDialog.Filter = "文本文件|*.txt";
 - if(saveFileDialog.ShowDialog() == DialogResult.OK){
 - StreamWriter streamWriter = newStreamWriter(saveFileDialog.FileName, false, System.Text.Encoding.GetEncoding("gb2312"));
 - streamWriter.Write(colName + " "+ rowText);streamWriter.Close();}}
 - catch(Exception ex){MessageBox.Show("保存txt失败"+ ex.Message);
 - }}
 
TXT转换EXECL:在txt转换excel的过程中,首先需要获取txt文本
- ///
 /// - /// StreamReader reader = null;
 - ///
 /// - /// Encoding myEncoding = Encoding.GetEncoding("GB2312");
 - ///
 - /// 导入txt///
 - ///
 - /// privatevoidbtnImportTxt_Click(objectsender, EventArgs e){
 - OpenFileDialog openFileDialog = newOpenFileDialog();
 - openFileDialog.InitialDirectory = "D:\";
 - openFileDialog.Filter = "TXT文件|*.txt";
 - openFileDialog.RestoreDirectory = true;openFileDialog.FilterIndex = 1;
 - if (openFileDialog.ShowDialog() == DialogResult.OK){string fName = openFileDialog.FileName;
 - textBox2.Text = fName;reader = new StreamReader(fName, System.Text.Encoding.GetEncoding("GB2312")); }}
 
然后对文本进行处理,用 reader.ReadLine()一行行地往下读,每读一行处理一行,直到读完为止。处理的时候需要把字符串均等平分,每30个字节写一个单元格。
- ///
 - /// 把字符串均等平分///
 - ///
 - ///
 privatestring[] spitText(stringSourceString){intlength = 30; - intlen = 0;byte[] SourceStr_Bytes = myEncoding.GetBytes(SourceString);
 - byte[] CutStr_Bytes1 = newbyte[length];
 - if(SourceStr_Bytes.Length % length != 0)len = SourceStr_Bytes.Length / length + 1;
 - elselen = SourceStr_Bytes.Length / length;string[] array = newstring[len];inti, j = 0;
 - for(i = 0; (i + length) <= SourceStr_Bytes.Length &&SourceStr_Bytes.Length >= i; ){
 - Array.Copy(SourceStr_Bytes, i, CutStr_Bytes1, 0, length);array[j] = myEncoding.GetString(CutStr_Bytes1);j++;ii = i + length;}
 - if(SourceStr_Bytes.Length % length != 0){
 - Array.Copy(SourceStr_Bytes, SourceStr_Bytes.Length - i, CutStr_Bytes1, 0, length);array[j] = myEncoding.GetString(CutStr_Bytes1);}returnarray;}
 - ///
 - /// 生成txt
 - ///
 - ///
 - ///
 - privatevoidbtnGenTxt_Click(objectsender, EventArgs e){SaveFileDialog saveFileDialog = newSaveFileDialog();saveFileDialog.Filter = "文本文件|*.xls";
 - if(saveFileDialog.ShowDialog() == DialogResult.OK){StreamWriter sw = newStreamWriter(saveFileDialog.FileName, true, System.Text.Encoding.GetEncoding("GB2312"));stringstr = "";
 - if(reader == null){MessageBox.Show("请导入txt");return;}try{
 - //写标题stringheadText = reader.ReadLine();
 - string[] array = spitText(headText);
 - for(inti = 0; i
 - //写内容stringtext;while((text = reader.ReadLine()) != null){stringtempStr = "";
 - string[] arrayText = spitText(text);
 - for(intf = 0; f
 - catch(Exception ex){MessageBox.Show(ex.Message);}finally{sw.Close();}}}
 
好了,到这里,TXT月EXCEL的互相转换功能就做好了,源码没找到地方上传,改天找个好的网盘上传。