比较C#三种方法实现读取Execl数据到数据库

方式一：用微软提供的Microsoft.Office.Interop.Excel这个DLL，程序读取Excel数据，代码如下：

Excel.Application m_ExcelFile = new Excel.Application();
Excel._Workbook m_Workbook;
Excel._Worksheet m_Worksheet;
object missing = System.Reflection.Missing.Value;

Console.WriteLine("excelFilePath:" + excelFilePath);
m_ExcelFile.Workbooks.Open(excelFilePath, missing, missing, missing, missing, missing, missing, missing, missing, missing
, missing, missing, missing, missing, missing);
m_ExcelFile.Visible = false;
m_Workbook = m_ExcelFile.Workbooks[1];
m_Worksheet = (Excel.Worksheet)m_Workbook.ActiveSheet;
int clomn_Count = m_Worksheet.UsedRange.Columns.Count;
int row_Count = m_Worksheet.UsedRange.Rows.Count;

for (int i = 2; i < row_Count + 1; i++)//
{
string lv_strSql;
string lv_strSqlOne = "insert into user (";
string lv_strSqlTwo = " value(";
for (int j = 1; j < clomn_Count + 1; j++)
{
if (((Excel.Range)m_Worksheet.UsedRange.Cells[1, j]).Text.ToString() == "会员姓名" && ((Excel.Range)m_Worksheet.UsedRange.Cells[i, j]).Text.ToString().Trim() != "")
{
lv_strSqlOne += "name,";
lv_strSqlTwo += "'" + ((Excel.Range)m_Worksheet.UsedRange.Cells[i, j]).Text.ToString() + "',";
}
.........//表格可能有好多列
else if (((Excel.Range)m_Worksheet.UsedRange.Cells[1, j]).Text.ToString() == "累计积分" && ((Excel.Range)m_Worksheet.UsedRange.Cells[i, j]).Text.ToString().Trim() != "")
{
lv_strSqlOne += "score,";
lv_strSqlTwo += "'" + ((Excel.Range)m_Worksheet.UsedRange.Cells[i, j]).Text.ToString() + "',";
}
}
lv_strSqlOne += "create_date,sync_flag)";
lv_strSqlTwo += "'" + DateTime.Now + "',0)";
lv_strSql = lv_strSqlOne + lv_strSqlTwo;
Console.WriteLine("lv_strSql:" + lv_strSql);
try
{
int lv_ret = m_db.RunNoQuery(lv_strSql);//执行数据库插入操作。
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
//关闭Excel相关对象
m_Worksheet = null;
m_Workbook = null;
m_ExcelFile.Quit();
m_ExcelFile = null;

第二种方式：直接把Excel当作数据库，用ODBC方式连接Excel，查询Excel的数据，代码如下：

String source = null;
OdbcConnection conn = null;
string sql = "select * from [Sheet1$]";
try
{
source = "Driver={Microsoft Excel Driver (*.xls)};DBQ=" + tbExcelFilePath.Text;
conn = new OdbcConnection(source);
conn.Open();
}
catch (OdbcException e)
{
try
{
source = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ=" + tbExcelFilePath.Text;
conn = new OdbcConnection(source);
conn.Open();
}
catch (OdbcException e1)
{
MessageBox.Show("请确认此文件没有被其它程序打开！");
}
}
try
{
OdbcCommand cmd = new OdbcCommand(sql, conn);
OdbcCommand cmd1 = new OdbcCommand("select count(*) from [Sheet1$]", conn);
OdbcDataReader read = cmd.ExecuteReader();
int count = int.Parse(cmd1.ExecuteScalar().ToString());
int rn = 1;
while (read.Read())
{
try
{
if (m_stop) break;
rn++;
string lv_strSql;
string lv_strSqlOne = "insert into user (";
string lv_strSqlTwo = " value(";
String[] row = new String[read.FieldCount];
for (int i = 0; i < read.FieldCount; i++)
{
row[i] = read.GetValue(i).ToString();

if (read.GetName(i) == "会员姓名" && read.GetValue(i).ToString().Trim() != "")
{
lv_strSqlOne += "name,";
lv_strSqlTwo += "'" + read.GetValue(i).ToString() + "',";
}
............//Excel可能有多列
else if (read.GetName(i) == "累计积分" && read.GetValue(i).ToString().Trim() != "")
{
lv_strSqlOne += "score,";
lv_strSqlTwo += "'" + read.GetValue(i).ToString() + "',";
}

}
lv_strSqlOne += "create_date,sync_flag)";
lv_strSqlTwo += "'" + DateTime.Now + "',0)";
lv_strSql = lv_strSqlOne + lv_strSqlTwo;
Console.WriteLine("lv_strSql:" + lv_strSql);

int lv_ret = m_db.RunNoQuery(lv_strSql);

}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
read.Close();
conn.Close();
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}

第三种方式：直接把Excel当作数据库，用OLEDB方式连接Excel，查询Excel的数据，代码如下：

String source = null;
OleDbConnection conn = null;
string sql = "select * from [Sheet1$]";
try
{

source = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + tbExcelFilePath.Text + ";Extended Properties=Excel 8.0";
conn = new OleDbConnection(source);
conn.Open();
}
catch (OdbcException e)
{
try
{

source = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + tbExcelFilePath.Text + ";Extended Properties=Excel 12.0";
conn = new OleDbConnection(source);
conn.Open();
}
catch (OdbcException e1)
{
MessageBox.Show("请确认此文件没有被其它程序打开！");
}
}
try
{
OleDbCommand cmd = new OleDbCommand(sql, conn);
OleDbCommand cmd1 = new OleDbCommand("select count(*) from [Sheet1$]", conn);
OdbcDataReader read = cmd.ExecuteReader();
int count = int.Parse(cmd1.ExecuteScalar().ToString());
int rn = 1;
while (read.Read())
{
try
{
if (m_stop) break;
rn++;
string lv_strSql;
string lv_strSqlOne = "insert into user (";
string lv_strSqlTwo = " value(";
String[] row = new String[read.FieldCount];
for (int i = 0; i < read.FieldCount; i++)
{
row[i] = read.GetValue(i).ToString();

if (read.GetName(i) == "会员姓名" && read.GetValue(i).ToString().Trim() != "")
{
lv_strSqlOne += "name,";
lv_strSqlTwo += "'" + read.GetValue(i).ToString() + "',";
}
............//Excel可能有多列
else if (read.GetName(i) == "累计积分" && read.GetValue(i).ToString().Trim() != "")
{
lv_strSqlOne += "score,";
lv_strSqlTwo += "'" + read.GetValue(i).ToString() + "',";
}

}
lv_strSqlOne += "create_date,sync_flag)";
lv_strSqlTwo += "'" + DateTime.Now + "',0)";
lv_strSql = lv_strSqlOne + lv_strSqlTwo;
Console.WriteLine("lv_strSql:" + lv_strSql);

int lv_ret = m_db.RunNoQuery(lv_strSql);

}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
read.Close();
conn.Close();
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}

总结：效率上第二种方式和第三种方式差不多，第一种方式最慢，建议用第二种或第三种方式。