将数据导入到已存在的excel文件中
CRUD数据访问类基类
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
namespace myexcel{
public class DbExcel
{
/// <summary>
/// 获取读取连接字符串
/// </summary>
/// <param name="phyfilepath"></param>
/// <returns></returns>
private static string GetOptionConnstr(string phyfilepath)
{
string endstr = phyfilepath.Substring(phyfilepath.IndexOf('.') + 1);
if (endstr.ToLower() == "xlsx")
{
return "Provider=Microsoft.ACE.OleDb.12.0;Extended Properties=\"Excel 12.0;HDR=no;\";Data Source=" + phyfilepath;
}
return "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=\"Excel 8.0;HDR=no;\";Data Source=" + phyfilepath;
}
/// <summary>
/// 获取操作连接字符串
/// </summary>
/// <param name="phyfilepath"></param>
/// <returns></returns>
private static string GetReadConnStr(string phyfilepath)
{
string endstr = phyfilepath.Substring(phyfilepath.IndexOf('.') + 1);
if (endstr.ToLower() == "xlsx")
{
return "Provider=Microsoft.ACE.OleDb.12.0;Extended Properties=\"Excel 12.0;HDR=yes;IMEX=1\";Data Source="+phyfilepath;
}
return "Provider=Microsoft.Jet." +
"OLEDB.4.0;Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";Data Source="+phyfilepath;
}
public static DataTable GetExcelDataTable(string phyfilepath)
{
OleDbConnection conn = null;
string sheetName = "Sheet1";
DataTable dataTable = null;
try
{
using (conn = new OleDbConnection(GetReadConnStr(phyfilepath)))
{
conn.Open();
DataTable sheetNames = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
foreach (DataRow dr in sheetNames.Rows)
{
sheetName = dr[2].ToString().Trim();
break;
}
OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + sheetName + "]", conn);
DataSet ds = new DataSet();
oada.Fill(ds, "InitData");
dataTable = ds.Tables["InitData"];
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
finally
{
conn.Close();
}
return dataTable;
}
public static DataTable GetExcelSheetTable(string phyfilepath)
{
OleDbConnection conn = null;
string sheetName = "Sheet1$";
DataTable dataTable = null;
try
{
using (conn = new OleDbConnection(GetReadConnStr(phyfilepath)))
{
conn.Open();
OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + sheetName + "]", conn);
DataSet ds = new DataSet();
oada.Fill(ds, "InitData");
dataTable = ds.Tables["InitData"];
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
//return null;
}
finally
{
conn.Close();
}
return dataTable;
}
public static DataTable GetExcelSheetTable(string phyfilepath,string SheetName)
{
OleDbConnection conn = null;
string sheetName = SheetName;
DataTable dataTable = null;
try
{
using (conn = new OleDbConnection(GetReadConnStr(phyfilepath)))
{
conn.Open();
DataTable sheetNames = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + sheetName + "]", conn);
DataSet ds = new DataSet();
oada.Fill(ds, "InitData");
dataTable = ds.Tables["InitData"];
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
finally
{
conn.Close();
}
return dataTable;
}
public static void ExcelColDataUpdate(string phyfilepath, string sheetName,string setvalue,string where)
{
OleDbConnection conn = null;
try
{
using (conn = new OleDbConnection(GetOptionConnstr(phyfilepath)))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "UPDATE ["+sheetName+"$] "+setvalue+" "+where;
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
finally
{
conn.Close();
}
}
public static void ExcelColDataInsert(string phyfilepath, string sheetName, string columnNames, string values)
{
OleDbConnection conn = null;
try
{
using (conn = new OleDbConnection(GetOptionConnstr(phyfilepath)))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into [" + sheetName + "$] (" + columnNames + ") values(" + values + ")";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
finally
{
conn.Close();
}
}
public static void ExcelVoucherDataInsert(string filePath, string sheetName, DataTable dt)
{
StringBuilder sb = new StringBuilder();
if (dt == null || dt.Rows.Count == 0) return;
try
{
using (OleDbConnection conn = new OleDbConnection(GetOptionConnstr(filePath)))
{
conn.Open();
foreach (DataRow row in dt.Rows)
{
OleDbCommand cmd = new OleDbCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into [" + sheetName + "$] values('" + row["FName"].ToString() + "','" + row["FNo"].ToString() + "','" + row["FIName"].ToString() + "')";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
}
public static void ExcelVoucherDataInsert(string filePath, string sheetName, string itemClass , string number , string name)
{
try
{
using (OleDbConnection conn = new OleDbConnection(GetOptionConnstr(filePath)))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into [" + sheetName + "$] values('" + itemClass + "','" + number + "','" + name + "')";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}
catch(Exception ex)
{
throw new BaseDBException(ex.Message);
}
}
public static void ExcelColDataInsert(string phyfilepath, string sheetName, string columnName, string[] values)
{
OleDbConnection conn = null;
try
{
using (conn = new OleDbConnection(GetOptionConnstr(phyfilepath)))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.CommandType = CommandType.Text;
foreach (string str in values)
{
cmd.CommandText = "insert into [" + sheetName + "$] (" + columnName + ") values(' " + str + "')";
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}
}
catch (Exception ex)
{
throw new BaseDBException(ex.Message);
}
finally
{
conn.Close();
}
}
}
}
编写连接与操作excel文件的通用函数
代码
protected void DoOleSql(string sql, string database)
{
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("\\") + database + "; Extended Properties='Excel 8.0;HDR=no;IMEX=0'";
try
{//打开连接
conn.Open();
}
catch (Exception e)
{
Response.Write(e.ToString());
}
OleDbCommand olecommand = new OleDbCommand(sql, conn);
try
{//执行语句
olecommand.ExecuteNonQuery();
}
catch (Exception eee)
{
Response.Write(eee.ToString());
conn.Close();
}
finally
{
conn.Close();//关闭数据库
}
conn.Close();
}
注：1）使用 Excel 工作簿时，默认情况下，区域中的第一行是标题行（或字段名称）。如果第一个区域不包含标题，您可以在连接字符串的扩展属性中指定 HDR=NO。如果您在连接字符串中指定 HDR=NO，Jet OLE DB 提供程序将自动为您命名字段（F1 表示第一个字段，F2 表示第二个字段，依此类推）；2）IMEX=1将所有读入数据看作字符，其他值（0、2）请查阅相关帮助文档；3）如果出现“找不到可安装的isam”错误，一般是连接字符串错误
3、从excel文件读取数据
string sql = "select * from [sheet1$]";
DoOleSql(sql,"test.xls");
4、更新excel文件中的数据
string sql = "update [sheet1$] set FieldName1='333' where FieldName2='b3'";
DoOleSql(sql,"test.xls");
5、向excel文件插入数据
string sql = "insert into [sheet1$](FieldName1,FieldName2,…) values('a',’b’,…)";
DoOleSql(sql,"test.xls");
6、删除excel文件中的数据：不提倡使用这种方法
7、对于非标准结构的excel表格，可以指定excel中sheet的范围
1）读取数据：string sql = "select * from [sheet1$A3:F20]";
2）更新数据：string sql = "update [sheet1$A9:F15] set FieldName='333' where AnotherFieldName='b3'";
3）插入数据：string sql = "insert into [sheet1$A9:F15](FieldName1,FieldName2,…) values('a',’b’,…)";
4）删除数据：不提倡
注：1）代码根据需要可以自行修改；2）如果出现“操作必须使用一个可更新的查询”错误，可能sql语句中对excel文件中的“字段”引用有错误，或对 excel文件不具有“修改”权限；3）如果出现“不能扩充选定范围”错误，可能是对excel文件引用的“范围”有错误。
