----------------表格开始-------------------
编号 姓名 性别
1 A 男
2 B 女
3 C 男
---------------表格结束--------------------
那么在保存CSV文件里面数据格式是这样的:
----------------内容开始----------------
编号,姓名,性别
1, A, 男
2, B, 女
3, C, 男
----------------内容结束----------------
用Excel打开是这样的:
下面是示例程序:
#include <stdio.h>
struct Student
{
int id
char name[10]
char gender[3]
}
int main(int argc, char *argv[])
{
// 在程序所在目录下面,可以看见一个名为 student.csv 的文件
FILE * file=fopen("student.csv","w")
struct Student studens[]=
{
{1,"A","男"},
{2,"B","女"},
{3,"C","男"},
}
int studensAmount=sizeof(studens)/sizeof(struct Student)
int i
if(file)
{
fprintf(file,"%s%,%s,%s\n","编号","姓名","性别");
for(i=0i<studensAmounti++)
{
fprintf(file,"%d%,%s,%s\n",studens[i].id,studens[i].name,studens[i].gender)
}
}
fclose(file)
return 0}
简单的方法是通过ODBC来实现:具体实现
一、 包含Excel文件 *** 作类头文件 #include "CSpreadSheet.h"
二、 新建Excel文件,并写入默认数据 // 新建Excel文件名及路径,TestSheet为内部表名 CSpreadSheet SS("c:\\Test.xls", "
1.方法一:采用OleDB读取EXCEL文件:
把EXCEL文件当做一个数据源来进行数据的读取 *** 作,实例如下:
public DataSet ExcelToDS(string Path){
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0" +"Data Source="+ Path +""+"Extended Properties=Excel 8.0"
OleDbConnection conn = new OleDbConnection(strConn)
conn.Open()
string strExcel = ""
OleDbDataAdapter myCommand = null
DataSet ds = null
strExcel="select * from [sheet1$]"
myCommand = new OleDbDataAdapter(strExcel, strConn)
ds = new DataSet()
myCommand.Fill(ds,"table1")
return ds
}
对于EXCEL中的表即sheet([sheet1$])如果不是固定的可以使用下面的方法得到
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0" +"Data Source="+ Path +""+"Extended Properties=Excel 8.0"OleDbConnection conn = new OleDbConnection(strConn)
DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,null)
string tableName=schemaTable.Rows[0][2].ToString().Trim()
另外:也可进行写入EXCEL文件,实例如下:
public void DSToExcel(string Path,DataSet oldds)
{
//先得到汇总EXCEL的DataSet 主要目的是获得EXCEL在DataSet中的结构
string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 Data Source ="+path1+"Extended Properties=Excel 8.0"
OleDbConnection myConn = new OleDbConnection(strCon)
string strCom="select * from [Sheet1$]"
myConn.Open ( )
OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom, myConn )
ystem.Data.OleDb.OleDbCommandBuilder builder=new OleDbCommandBuilder(myCommand)
//QuotePrefix和QuoteSuffix主要是对builder生成InsertComment命令时使用。
builder.QuotePrefix="[" //获取insert语句中保留字符(起始位置)
builder.QuoteSuffix="]" //获取insert语句中保留字符(结束位置)
DataSet newds=new DataSet()
myCommand.Fill(newds ,"Table1")
for(int i=0i<oldds.Tables[0].Rows.Counti++)
{
在使用ImportRow后newds内有值,但不能更新到Excel中因为所有导入行的
DataRowState!=AddedDataRow nrow=aDataSet.Tables["Table1"].NewRow()
for(int j=0j<newds.Tables[0].Columns.Countj++)
{
nrow[j]=oldds.Tables[0].Rows[i][j]
}
newds.Tables["Table1"].Rows.Add(nrow)
}
myCommand.Update(newds,"Table1")
myConn.Close()
}
2.方法二:引用的com组件:Microsoft.Office.Interop.Excel.dll 读取EXCEL文件
首先是Excel.dll的获取,将Office安装目录下的Excel.exe文件Copy到DotNet的bin目录下,cmd到该目录下,运行 TlbImp EXCEL.EXE Excel.dll 得到Dll文件。 再在项目中添加引用该dll文件.
//读取EXCEL的方法 (用范围区域读取数据)
private void OpenExcel(string strFileName)
{
object missing = System.Reflection.Missing.Value
Application excel = new Application()//lauch excel application
if (excel == null)
{
Response.Write("<script>alert('Can't access excel')</script>")
}
else
{
excel.Visible = false excel.UserControl = true
// 以只读的形式打开EXCEL文件
Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
missing, missing, missing, true, missing, missing, missing, missing, missing)
//取得第一个工作薄
Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1)
//取得总记录行数 (包括标题列)
int rowsint = ws.UsedRange.Cells.Rows.Count //得到行数
//int columnsint = mySheet.UsedRange.Cells.Columns.Count//得到列数
//取得数据范围区域 (不包括标题列)
Range rng1 = ws.Cells.get_Range("B2", "B" + rowsint) //item
Range rng2 = ws.Cells.get_Range("K2", "K" + rowsint) //Customer
object[,] arryItem= (object[,])rng1.Value2 //get range's value
object[,] arryCus = (object[,])rng2.Value2
//将新值赋给一个数组
string[,] arry = new string[rowsint-1, 2]
for (int i = 1 i <= rowsint-1 i++)
{
//Item_Code列
arry[i - 1, 0] =arryItem[i, 1].ToString()
//Customer_Name列
arry[i - 1, 1] = arryCus[i, 1].ToString()
}
Response.Write(arry[0, 0] + " / " + arry[0, 1] + "#" + arry[rowsint - 2, 0] + " / " + arry[rowsint - 2, 1])
}
excel.Quit() excel = null
Process[] procs = Process.GetProcessesByName("excel")
foreach (Process pro in procs)
{
pro.Kill()//没有更好的方法,只有杀掉进程
}
GC.Collect()
}
3.方法三:将EXCEL文件转化成CSV(逗号分隔)的文件,用文件流读取(等价就是读取一个txt文本文件)。
先引用命名空间:using System.Text和using System.IO
FileStream fs = new FileStream("d:\\Customer.csv", FileMode.Open, FileAccess.Read, FileShare.None)StreamReader sr = new StreamReader(fs, System.Text.Encoding.GetEncoding(936))
string str = ""
string s = Console.ReadLine()
while (str != null)
{ str = sr.ReadLine()
string[] xu = new String[2]
xu = str.Split(',')
string ser = xu[0]
string dse = xu[1] if (ser == s)
{ Console.WriteLine(dse)break
}
} sr.Close()
另外也可以将数据库数据导入到一个txt文件,实例如下:
//txt文件名
string fn = DateTime.Now.ToString("yyyyMMddHHmmss") + "-" + "PO014" + ".txt"
OleDbConnection con = new OleDbConnection(conStr)
con.Open()
string sql = "select ITEM,REQD_DATE,QTY,PUR_FLG,PO_NUM from TSD_PO014"
//OleDbCommand mycom = new OleDbCommand("select * from TSD_PO014", mycon)
//OleDbDataReader myreader = mycom.ExecuteReader() //也可以用Reader读取数据
DataSet ds = new DataSet()
OleDbDataAdapter oda = new OleDbDataAdapter(sql, con)
oda.Fill(ds, "PO014")
DataTable dt = ds.Tables[0]
FileStream fs = new FileStream(Server.MapPath("download/" + fn), FileMode.Create, FileAccess.ReadWrite)
StreamWriter strmWriter = new StreamWriter(fs) //存入到文本文件中
//把标题写入.txt文件中
//for (int i = 0 i <dt.Columns.Counti++)
//{
// strmWriter.Write(dt.Columns[i].ColumnName + " ")
//}
foreach (DataRow dr in dt.Rows)
{
string str0, str1, str2, str3
string str = "|" //数据用"|"分隔开
str0 = dr[0].ToString()
str1 = dr[1].ToString()
str2 = dr[2].ToString()
str3 = dr[3].ToString()
str4 = dr[4].ToString().Trim()
strmWriter.Write(str0)
strmWriter.Write(str)
strmWriter.Write(str1)
strmWriter.Write(str)
strmWriter.Write(str2)
strmWriter.Write(str)
strmWriter.Write(str3)
strmWriter.WriteLine() //换行
}
strmWriter.Flush()
strmWriter.Close()
if (con.State == ConnectionState.Open)
{
con.Close()
}
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)