Microsoft.Office.Interop.Excel.ApplicationClass 將DataTable中的數據插入EXCEL
/// <summary>
/// 將DataSet裏所有數據導入Excel.
/// 需要添加COM: Microsoft Excel Object Library.
/// using Excel;
/// </summary>
/// <param name="filePath">Excel文件的路徑</param>
/// <param name="ds">到導入Excel的數據源</param>
private void ExportToExcel(string filePath, DataSet ds)
{
object oMissing = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Excel.ApplicationClass xlApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
try
{
//打開EXCEL文件
Microsoft.Office.Interop.Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(filePath, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing);
// Excel.Workbook xlWorkbook=xlApp.Workbooks.只有Open屬性，沒有Write屬性
Microsoft.Office.Interop.Excel.Worksheet xlWorksheet;
//循環所有DataTable
for (int i = 0; i < ds.Tables.Count; i++)
{
//添加入一個新的Sheel頁
xlWorksheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkbook.Worksheets.Add(oMissing, oMissing, 1, oMissing);
//以TableName作爲新加的sheel頁名
xlWorksheet.Name = ds.Tables[i].TableName;
//取出這個DataTable中的所有值，暫時存於stringBuffer中
StringBuilder stringBuffer =new StringBuilder();
for (int j = 0; j < ds.Tables[i].Rows.Count; j++)
{
for (int k = 0; k < ds.Tables[i].Columns.Count; k++)
{
stringBuffer.Append( ds.Tables[i].Rows[j][k].ToString());
if (k < ds.Tables[i].Columns.Count - 1)
stringBuffer.Append("\t");
}
stringBuffer.Append("\n");
}
//利用系統剪貼板
System.Windows.Forms.Clipboard.SetDataObject("");
//將stringBuffer放入剪貼板
System.Windows.Forms.Clipboard.SetDataObject(stringBuffer);
//選中這個sheel頁中的第一個單元格
((Excel.Range)xlWorksheet.Cells[1, 1]).Select();
//粘貼
xlWorksheet.Paste(oMissing, oMissing);
//清空系統剪貼板
System.Windows.Forms.Clipboard.SetDataObject("");
}
//保存並關閉這個工作薄
xlWorkbook.Close(Microsoft.Office.Interop.Excel.XlSaveAction.xlSaveChanges, oMissing, oMissing);
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkbook);
xlWorkbook = null;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
//釋放...
xlApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
xlApp = null;
GC.Collect();
}
}
OleDbConnection connection;
//打開數據庫連接
public void OpenConnection(string xlsFils) {
if (!File.Exists(xlsFils))
{
MessageBox.Show("文件\"" + xlsFils + "\"不存在", "提示");
return;
}
string conn = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =" + xlsFils + ";Extended Properties='Excel 8.0;HDR=no;IMEX=0'";
connection = new OleDbConnection(conn);
connection.Open();
}
//查詢數據
public DataTable Select()
{
DataTable dt = new DataTable();
string Sql = "select * from [Sheet1$]";
OleDbDataAdapter mycommand = new OleDbDataAdapter(Sql, connection);
mycommand.Fill(dt);
return dt;
}
private void Form1_Load(object sender, EventArgs e)
{
string xlsFile = System.Windows.Forms.Application.StartupPath + "/" + "ExcelFiles/test.xls";
OpenConnection(xlsFile);
}
//插入數據
public void Insert()
{
string sql = string.Format("insert into [Sheet1$] values('{0}','{1}','{2}')", "陳太漢", "陳曉玲", "520");
OleDbCommand myCommand = new OleDbCommand(sql, connection);
myCommand.ExecuteNonQuery();
Select();
}
private void btAdd_Click(object sender, EventArgs e)
{
Insert();
}
//Excel不支持SQl語句的方式進行刪除，可以用把每個字段的值設爲空的方式進行刪除
public void Delete()
{
string sql = string.Format("Update [Sheet1$] set col1=NULL,col2=NULL,col3=NULL where col1='{0}'", "陳太漢");
OleDbCommand myCommand = new OleDbCommand(sql, connection);
myCommand.ExecuteNonQuery();
Select();
}
private void btDelete_Click(object sender, EventArgs e)
{
Delete();
}
//更新數據
private new void Update() {
string sql = string.Format("update [Sheet1$] set col1='{0}' where col1='{1}'", "陳曉玲","陳太漢");
OleDbCommand myCommand = new OleDbCommand(sql, connection);
myCommand.ExecuteNonQuery();
Select();
}
private void btUpdate_Click(object sender, EventArgs e)
{
Update();
}
private void btSelect_Click(object sender, EventArgs e)
{
Select();
}
注：1）使用 Excel 工作簿時，默認情況下，區域中的第一行是標題行（或字段名稱）。如果第一個區域不包含標題，您可以在連接字符串的擴展屬性中指定 HDR=NO。如果您在連接字符串中指定 HDR=NO，Jet OLE DB 提供程序將自動爲您命名字段（不管excel中的列叫什麼名字，F1 表示第一個字段，F2 表示第二個字段，依此類推，select F1,F2 from [sheet1$]）；
2）IMEX=1將所有讀入數據看作字符，其他值（0、2）請查閱相關幫助文檔；
3）如果出現“找不到可安裝的isam”錯誤，一般是連接字符串錯誤
DoOleSql(sql,"test.xls");6、刪除excel文件中的數據：不提倡使用這種方法
7、對於非標準結構的excel表格，可以指定excel中sheet的範圍
1）讀取數據：string sql = "select * from [sheet1$A3:F20]";
2）更新數據：string sql = "update [sheet1$A9:F15] set FieldName='333' where AnotherFieldName='b3'";
3）插入數據：string sql = "insert into [sheet1$A9:F15](FieldName1,FieldName2,…) values('a',’b’,…)";
2003和2007的鏈接區別
//string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + excelFile + ";Extended Properties='Excel 8.0; HDR=NO; IMEX=1'"; //此連接只能操作Excel2007之前(.xls)文件
string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + excelFile + ";Extended Properties='Excel 12.0; HDR=NO; IMEX=1'"; //此連接可以操作.xls與.xlsx文件
//獲取excel中都有哪些sheet
dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);