C#读取EXECL关键代码

string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filename + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1; '";

OleDbConnection conn = new OleDbConnection(strCon);
conn.Open();
//返回Excel的架构，包括各个sheet表的名称,类型，创建时间和修改时间等　
DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
//包含excel中表名的字符串数组
string[] strTableNames = new string[dtSheetName.Rows.Count];
for (int k = 0; k < dtSheetName.Rows.Count; k++)
{
strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();
}

for (int j = 0; j < strTableNames.Length; j++)
{
DataTable dt = new DataTable();
//从指定的表明查询数据,可先把所有表明列出来供用户选择
string strExcel= "select * from [" + strTableNames[j] + "]";
myCommand = new OleDbDataAdapter(strExcel, strCon);
myCommand.Fill(dt);
}