c# - OleDbDataReader cmd.ExecuteReader() “枚举没有结果”
问题描述
我试图从excel文件中获取数据并将其设置在数据库中
var path = GetPath(activityId);
path = Path.Combine(path, fileName);
var strConnection = GetConnectionString();
var excelConnString = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0\"", path);
using (OleDbConnection excelConnection = new OleDbConnection(excelConnString))
{
excelConnection.Open();
DataTable dtSchema = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
string firstSheetName = dtSchema.Rows[0]["TABLE_NAME"].ToString();
using (OleDbCommand cmd = new OleDbCommand("Select * from [" + firstSheetName + "]" , excelConnection))
{
using (OleDbDataReader dReader = cmd.ExecuteReader())
{
using (SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection))
{
sqlBulk.DestinationTableName = tableName;
while (dReader.Read())
{
sqlBulk.WriteToServer(dReader);
}
}
}
}
但是当我调试时,我sqlBulk.WriteToServer(dReader);
也显示了这个错误,数据也没有加载到表中:
Empty = "枚举没有结果"
我尝试了很多答案但没有成功
注意:我上传的 excel 字段和我的表格看起来一样
解决方案
我通过如下更改我的代码(OleDbDataAdapter
改为使用OleDbDataReader
)解决了这个问题:
DataTable Contents = new DataTable();
using (OleDbDataAdapter cmd = new OleDbDataAdapter("Select * from [" + firstSheetName + "]", excelConnection))
{
cmd.Fill(Contents);
using (SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection))
{
sqlBulk.DestinationTableName = tableName;
sqlBulk.WriteToServer(Contents);
}
}