记录一下关于C#导入EXCEL数据到数据库的方法
第一次做EXCEL导入SQL数据库的功能，查阅并借鉴了很多博主的方法，在这里记录一下，方便以后取用，有改进的地方也请大家指出，这里前端使用的是layUI，这里使用了两种方法，步骤都是先将文件上传至服务器，再读到DataTable中，前一种是通过sql一条一条的insert，而第二种通过SQLBulkCopy来操作。
public string uploadExcelToSQL()
{DBHelper db = new DBHelper();
var file = Context.Request.Files[0];
//获取文件路径
string filenPath = Context.Request.Files[0].FileName;
//获取文件名
string fileName = Path.GetFileNameWithoutExtension(Context.Request.Files[0].FileName);
//获取文件扩展名
string fileExtName = filenPath.Substring(filenPath.LastIndexOf(".") + 1);
string response = null;
System.Data.DataTable dt = new System.Data.DataTable();
try
{
string sFileName = "Files/" + fileName;
if (File.Exists(Server.MapPath(sFileName)))
{
File.Delete(Server.MapPath(sFileName));
}
file.SaveAs(Server.MapPath(sFileName));
//HDR=Yes，这代表第一行是标题，不做为数据使用 ，如果用HDR=NO，则表示第一行不是标题，做为数据来使用。系统默认的是YES
string connstr2003 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath(sFileName) + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
string connstr2007 = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Server.MapPath(sFileName) + ";Extended Properties=\"Excel 12.0;HDR=YES\"";
OleDbConnection conn;
if (fileExtName == "xls")
{
conn = new OleDbConnection(connstr2003);
}
else
{
conn = new OleDbConnection(connstr2007);
}
conn.Open();
string sql = "select * from [Sheet1$]";
OleDbCommand cmd = new OleDbCommand(sql, conn);
OleDbDataReader sdr = cmd.ExecuteReader();
dt.Load(sdr);
sdr.Close();
conn.Close();
//删除服务器里上传的文件
if (File.Exists(Server.MapPath(sFileName)))
{
File.Delete(Server.MapPath(sFileName));
}
//return dt;
}
catch (Exception e)
{
}
int errorcount = 0;//记录错误信息条数
int insertcount = 0;//记录插入成功条数
int updatecount = 0;//记录更新信息条数
string strcon = "Data Source=(local);Initial Catalog=NPMclz;User Id=sa;Password=zzy789864;";
SqlConnection con = new SqlConnection(strcon);//链接数据库
for (int i = 0; i < dt.Rows.Count; i++)
{
string companyName = dt.Rows[i][0].ToString();
string societyCreditCode = dt.Rows[i][1].ToString();
string legalPerson = dt.Rows[i][2].ToString();
string lgpsPhone = dt.Rows[i][3].ToString();
string agent = dt.Rows[i][4].ToString();
string agentPhone = dt.Rows[i][5].ToString();
string lgpsAddress = dt.Rows[i][6].ToString();
string runAddress = dt.Rows[i][7].ToString();
string mainBusinessForm = dt.Rows[i][8].ToString();
string cartingStyle = dt.Rows[i][9].ToString();
string runWay = dt.Rows[i][10].ToString();
string isSchool = dt.Rows[i][11].ToString();
string isRunByNet = dt.Rows[i][12].ToString();
string netAddress = dt.Rows[i][13].ToString();
string isCenterKitchen = dt.Rows[i][14].ToString();
string isSendForGroup = dt.Rows[i][15].ToString();
string runProject = dt.Rows[i][16].ToString();
string licenseCode = dt.Rows[i][17].ToString();
string supervisionOrg = dt.Rows[i][18].ToString();
string supervisionPerson = dt.Rows[i][19].ToString();
string certificateOrg = dt.Rows[i][20].ToString();
string certificatePerson = dt.Rows[i][21].ToString();
string certificateDate = dt.Rows[i][22].ToString();
string overDate = dt.Rows[i][23].ToString();
string outWarehouse = dt.Rows[i][24].ToString();
string logoutDate = dt.Rows[i][25].ToString();
if (companyName != "" && licenseCode != "")
{
string sqlStr = null;
//SqlCommand selectcmd = new SqlCommand("select count(*) from users where licenseCode='" + licenseCode + "'");
//int count = Convert.ToInt32(selectcmd.ExecuteScalar());
sqlStr = string.Format("select count(*) from Company where licenseCode='" + licenseCode + "'");
int count = db.ExecuteScalarToInt(sqlStr);
if (count > 0)
{
updatecount++;
}
else
{
//SqlCommand insertcmd = new SqlCommand(, con);
//insertcmd.ExecuteNonQuery();
sqlStr = string.Format("insert into Company(companyName,societyCreditCode,legalPerson,lgpsPhone,agent,agentPhone,lgpsAddress,runAddress,mainBusinessForm,cartingStyle,runWay,isSchool,isRunByNet,netAddress,isCenterKitchen,isSendForGroup,runProject,licenseCode,supervisionOrg,supervisionPerson,certificateOrg,certificatePerson,certificateDate,overDate,outWarehouse,logoutDate) values ('" + companyName + "', '" + societyCreditCode + "', '" + legalPerson + "', '" + lgpsPhone + "', '" + agent + "', '" + agentPhone + "', '" + lgpsAddress + "', '" + runAddress + "', '" + mainBusinessForm + "', '" + cartingStyle + "', '" + runWay + "', '" + isSchool + "', '" + isRunByNet + "', '" + netAddress + "', '" + isCenterKitchen + "', '" + isSendForGroup + "', '" + runProject + "', '" + licenseCode + "', '" + supervisionOrg + "', '" + supervisionPerson + "', '" + certificateOrg + "', '" + certificatePerson + "', '" + certificateDate + "', '" + overDate + "','" + outWarehouse + "','" + logoutDate + "')");
db.ExecuteNonQuery(sqlStr);
insertcount++;
}
}
else
{
errorcount++;
}
}
//Response.Write((insertcount + "条数据导入成功！" + updatecount + "条数据重复！" + errorcount + "条数据部分信息为空没有导入！"));
response = "{\"code\": 0,\"msg\": \"成功\",\"data\": {\"成功导入数\": \"" + insertcount + "\",\"重复数目\": \"" + updatecount + "\",\"未导入数目\": \"" + errorcount + "\"}}"; ;
return response;
}
}
更新线
============================================================================
使用前面的这个方法他是一条一条通过insert插入数据，有一个很大的问题，就是要反复写sql insert数据，导致插入速度异常缓慢。后来在网上查询得知了使用SQLBulkCopy可以可快速插入数据，于是尝试了一下，发现真的可以，特此记录一下
public string SqlBulkCopyByDatatable(string connectionString, string TableName, DataTable dt)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
using (SqlBulkCopy sqlbulkcopy =
new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction))
{
try
{
sqlbulkcopy.DestinationTableName = TableName;
for (int i = 0; i < dt.Columns.Count; i++)
{
sqlbulkcopy.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName);
}
sqlbulkcopy.WriteToServer(dt);
return "200";
}
catch (System.Exception ex)
{
throw (ex);
}
}
}
}