Excel与DataGridView
转自: http://blog.csdn.net/lpy1016lc/article/details/13275415
- C# winform Excel 数据导入
class ExcelCtrl
{
#region 将DataGridView控件中数据导出到Excel
/// <summary>
/// 将DataGridView控件中数据导出到Excel
/// </summary>
/// <param name="gridView">DataGridView对象</param>
/// <param name="isShowExcle">是否显示Excel界面</param>
/// <returns></returns>
public bool ExportDataGridview(DataGridView gridView, bool isShowExcle,string path)
{
if (gridView.Rows.Count == 0)
return false;
//建立Excel对象
Excel.Application excel = new Excel.Application();
Excel.Workbook myWorkBook=excel.Application.Workbooks.Add(true);
excel.Visible = isShowExcle;
//生成字段名称
for (int i = 0; i < gridView.ColumnCount; i++)
{
excel.Cells[1, i + 1] = gridView.Columns[i].HeaderText;
}
//填充数据
for (int i = 0; i < gridView.Rows.Count - 1; i++)
{
for (int j = 0; j < gridView.Columns.Count; j++)
{
if (gridView[j, i].ValueType == typeof(string))
{
excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString();
}
else
{
excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString();
}
}
}
object missing = System.Reflection.Missing.Value;
excel.ActiveWorkbook.Saved = true;
excel.ActiveWorkbook.SaveAs(path,
Microsoft.Office.Interop.Excel.XlFileFormat.xlExcel9795,
missing, missing, false,
false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,
missing, missing, missing, missing, missing);
myWorkBook.Close(missing, missing, missing);
myWorkBook = null;
excel.Quit();
return true;
}
#endregion
#region 将DataGridView控件中数据导出到Excel，excel格式本身就可以充当数据库，所以我以这种方式进行查询读取
public DataTable ImportExcel(string path)
{
string Connecstr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path
+ ";Extended Properties='Excel 8.0;HDR=YES; IMEX=1'";
OleDbConnection Con = new OleDbConnection(Connecstr);
Con.Open();
string strCommand = "SELECT * FROM [Sheet1$]";
OleDbDataAdapter adapter = new OleDbDataAdapter(strCommand, Con);
DataSet DS = new DataSet();
adapter.Fill(DS, "[Sheet1$]");
DataTable dt=DS.Tables[0];
Con.Close();
return dt;
}
#endregion
}
- ASP.NET Excel数据导入功能
protected void btnImport_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile == false ) // HasFile用来检查FileUpload是否有指定文件
{
Response.Write( " <script>alert('请您选择Excel文件')</script> " );
return ; // 当无文件时,返回
}
string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower(); //System.IO.Path.GetExtension获得文件的扩展名
if (IsXls != " .xls " )
{
Response.Write( " <script>alert('只可以选择Excel文件')</script> " );
return ; // 当选择的不是Excel文件时,返回
}
string filename = FileUpload1.FileName; // 获取Execle文件名 DateTime日期函数
string savePath = Server.MapPath(( " upfiles\\ " ) + filename); //Server.MapPath 获得虚拟服务器相对路径
FileUpload1.SaveAs(savePath); // SaveAs 将上传的文件内容保存在服务器上
DataSet ds = ExcelSqlConnection(savePath, filename); // 调用自定义方法
DataRow[] dr = ds.Tables[ 0 ].Select(); // 定义一个DataRow数组
int rowsnum = ds.Tables[ 0 ].Rows.Count;
if (rowsnum == 0 )
{
Response.Write( " <script>alert('Excel表为空表,无数据!')</script> " ); // 当Excel表为空时,对用户进行提示
}
else
{
for ( int i = 0 ; i < dr.Length; i ++ )
{
// 前面除了你需要在建立一个“upfiles”的文件夹外，其他的都不用管了，你只需要通过下面的方式获取Excel的值，然后再将这些值用你的方式去插入到数据库里面
string title = dr[i][ " 标题 " ].ToString();
string linkurl = dr[i][ " 链接地址 " ].ToString();
string categoryname = dr[i][ " 分类 " ].ToString();
string customername = dr[i][ " 内容商 " ].ToString();
// Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");
}
Response.Write( " <script>alert('Excle表导入成功!');</script> " );
}
}
#region 连接Excel 读取Excel数据 并返回DataSet数据集合
/// <summary>
/// 连接Excel 读取Excel数据 并返回DataSet数据集合
/// </summary>
/// <param name="filepath"> Excel服务器路径 </param>
/// <param name="tableName"> Excel表名称 </param>
/// <returns></returns>
public static System.Data.DataSet ExcelSqlConnection( string filepath, string tableName)
{
string strCon = " Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " + filepath + " ;Extended Properties='Excel 8.0;HDR=YES;IMEX=1' " ;
OleDbConnection ExcelConn = new OleDbConnection(strCon);
try
{
string strCom = string .Format( " SELECT * FROM [Sheet1$] " );
ExcelConn.Open();
OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn);
DataSet ds = new DataSet();
myCommand.Fill(ds, " [ " + tableName + " $] " );
ExcelConn.Close();
return ds;
}
catch
{
ExcelConn.Close();
return null ;
}
}
#endregion
1.方法一：采用OleDB读取EXCEL文件：
///把EXCEL文件当做一个数据源来进行数据的读取操作，实例如下：
public DataSet ExcelToDS(string Path)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
string strExcel = "";
OleDbDataAdapter myCommand = null;
DataSet ds = null;
strExcel="select * from [sheet1$]";
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=0;i<oldds.Tables[0].Rows.Count;i++)
{
//在这里不能使用ImportRow方法将一行导入到news中，因为ImportRow将保留原来DataRow的所有设置(DataRowState状态不变)。
/// 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!=Added
DataRow nrow=aDataSet.Tables["Table1"].NewRow();
for(int j=0;j<newds.Tables[0].Columns.Count;j++)
{
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。 点击此处下载此文 件：/Files/songliang/DLL文件.rar
///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.Count;i++)
//{
// 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();
}
