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using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Channels;
using BP.DA;
using System.Data;
using System.Data.Odbc;
using System.Data.OleDb;
using System.IO;
using System.Text;
namespace BP.Difference
{
public class DA_DbLoad
{
public static string GenerFirstTableName(string fileName)
{
return GenerTableNameByIndex(fileName, 0);
}
public static string GenerTableNameByIndex(string fileName, int index)
{
String[] excelSheets = GenerTableNames(fileName);
if (excelSheets != null)
return excelSheets[index];
if (excelSheets.Length < index)
throw new Exception("err@table的索引号错误" + index + "最大索引号为:" + excelSheets.Length);
return null;
}
public static string[] GenerTableNames(string fileName)
{
try
{
string strConn = "Provider=Microsoft.Jet.Oledb.4.0;Data Source=" + fileName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
if (fileName.ToLower().Contains(".xlsx"))
strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
OleDbConnection con = new OleDbConnection(strConn);
con.Open();
//计算出有多少个工作表sheet
DataTable dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null) return null;
String[] excelSheets = new String[dt.Rows.Count];
for (int i = 0; i < dt.Rows.Count; i++)
{
excelSheets[i] = dt.Rows[i]["TABLE_NAME"].ToString();
}
con.Close();
con.Dispose();
return excelSheets;
}
catch (Exception ex)
{
throw new Exception("读取文件期间出现错误:[" + fileName + "]" + ex.Message);
}
}
/// <summary>
/// 删除表中的空数据行
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static DataTable DeleteEmptyRows(DataTable dt)
{
List<DataRow> removelist = new List<DataRow>();
for (int i = 0; i < dt.Rows.Count; i++)
{
bool rowdataisnull = true;
for (int j = 0; j < dt.Columns.Count; j++)
{
if (!string.IsNullOrEmpty(dt.Rows[i][j].ToString().Trim()))
{
rowdataisnull = false;
}
}
if (rowdataisnull)
{
removelist.Add(dt.Rows[i]);
}
}
for (int i = 0; i < removelist.Count; i++)
{
dt.Rows.Remove(removelist[i]);
}
return dt;
}
public static DataTable ReadExcelFileToDataTableBySQL(string filePath, string tableName)
{
string sql = "SELECT * FROM [" + tableName + "]";
DataTable dt = new DataTable("dt");
string typ = System.IO.Path.GetExtension(filePath).ToLower();
string strConn;
switch (typ.ToLower())
{
case ".xls":
if (sql == null)
{
sql = "SELECT * FROM [" + GenerFirstTableName(filePath) + "]";
}
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source =" + filePath + ";Extended Properties=Excel 8.0";
System.Data.OleDb.OleDbConnection conn = new OleDbConnection(strConn);
OleDbDataAdapter ada = new OleDbDataAdapter(sql, conn);
try
{
conn.Open();
ada.Fill(dt);
dt.TableName = Path.GetFileNameWithoutExtension(filePath);
}
catch (System.Exception ex)
{
conn.Close();
throw ex;//(ex.Message);
}
conn.Close();
break;
case ".xlsx":
if (sql == null)
sql = "SELECT * FROM [" + GenerFirstTableName(filePath) + "]";
try
{
strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES\"";
System.Data.OleDb.OleDbConnection conn121 = new OleDbConnection(strConn);
OleDbDataAdapter ada91 = new OleDbDataAdapter(sql, conn121);
conn121.Open();
ada91.Fill(dt);
dt.TableName = Path.GetFileNameWithoutExtension(filePath);
conn121.Close();
ada91.Dispose();
}
catch (System.Exception ex1)
{
try
{
strConn = "Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\"";
System.Data.OleDb.OleDbConnection conn1215 = new OleDbConnection(strConn);
OleDbDataAdapter ada919 = new OleDbDataAdapter(sql, conn1215);
ada919.Fill(dt);
dt.TableName = Path.GetFileNameWithoutExtension(filePath);
ada919.Dispose();
conn1215.Close();
}
catch
{
}
throw ex1;//(ex.Message);
}
break;
case ".dbf":
strConn = "Driver={Microsoft dBASE Driver (*.DBF)};DBQ=" + System.IO.Path.GetDirectoryName(filePath) + "\\"; //+FilePath;//
OdbcConnection conn1 = new OdbcConnection(strConn);
OdbcDataAdapter ada1 = new OdbcDataAdapter(sql, conn1);
conn1.Open();
try
{
ada1.Fill(dt);
}
catch//(System.Exception ex)
{
try
{
int sel = ada1.SelectCommand.CommandText.ToLower().IndexOf("select") + 6;
int from = ada1.SelectCommand.CommandText.ToLower().IndexOf("from");
ada1.SelectCommand.CommandText = ada1.SelectCommand.CommandText.Remove(sel, from - sel);
ada1.SelectCommand.CommandText = ada1.SelectCommand.CommandText.Insert(sel, " top 10 * ");
ada1.Fill(dt);
dt.TableName = "error";
}
catch (System.Exception ex)
{
conn1.Close();
throw new Exception("读取DBF数据失败" + ex.Message + " SQL:" + sql);
}
}
conn1.Close();
break;
default:
break;
}
return DeleteEmptyRows(dt);
}
}
}