此代码正常工作。但是当我想改变范围时,给出OleDBException。C#Excel查询问题
OleDbCommand dates = new OleDbCommand("SELECT date FROM ["Sheet1$A1:B150"] ", baglanti);
OleDbDataReader reader= dates.ExecuteReader();
while (reader.Read())
{
list.Add(reader["date"]);
}
范围内变化的版本:
OleDbCommand dates = new OleDbCommand("SELECT date FROM ["Sheet1$A250:B350"] ", baglanti);
OleDbDataReader reader= dates.ExecuteReader();
while (reader.Read())
{
list.Add(reader["date"]);
}
的例外是:
System.Data.OleDb.OleDbException was unhandled by user code
ErrorCode=-2147217904
HResult=-2147217904
Message=No value is entered for one or more required parameters.
Source=Microsoft Access Database Engine
StackTrace:
konum: System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
konum: System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
konum: System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
konum: System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
konum: System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior)
konum: Hasta_Bulucu.Form1.bul_DoWork(Object sender, DoWorkEventArgs e) C:\Users\Furka\documents\visual studio 2015\Projects\Hasta Bulucu\Hasta Bulucu\Form1.cs içinde: satır 269
konum: System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
konum: System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
InnerException:
请问您可以添加您用来初始化OledDbConnection的连接字符串吗? – andrews
@andrews OleDbConnection baglanti = new OleDbConnection(@“Provider = Microsoft.ACE.OLEDB.12.0; Data Source =”+ filePick.FileName.ToString()+“; Mode = Read; Extended Properties ='Excel 12.0 xml; HDR = YES; IMEX = 1;'“); –
@andrews当我将范围A1设置为R250时,它包含工作表的标题,但A150至R300不包括标题。所以sql命令找不到列名。我需要在这个选项中包含标题信息。那么该怎么做呢? –