未处理的“System.Data.OleDb.OleDbException”类型的异常出现在system.data.dll中

主要代码：是在form里的

usingSystem;

usingSystem.Data;

usingSystem.Data;

usingSystem.Data.OleDb;

usingSystem.Drawing;

usingSystem.Collections;

usingSystem.ComponentModel;

usingSystem.Windows.Forms;

OleDbConnectionconnection1=newOleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;"+"DataSource=c:db.mdb");

stringsql="selectname,passwordfromuserwherename='"+textBox1.Text+"'";

connection1.Open();

OleDbDataAdapteradp=newOleDbDataAdapter(sql,connection1);

DataSetds=newDataSet();

adp.Fill(ds);就是这行代码有问题.

我trycatch后的异常显示：

System.Data.OleDb.OleDbException:FROM子句语法错误.

atSystem.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(Int32hr)

atSystem.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMSdbParams,Object&executeResult)

atSystem.Data.OleDb.OleDbCommand.ExecuteCommandText(Object&executeResult)

atSystem.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehaviorbehavior,Object&executeResult)

atSystem.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehaviorbehavior,Stringmethod)

atSystem.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehaviorbehavior)

atSystem.Data.OleDb.OleDbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehaviorbehavior)

atSystem.Data.Common.DbDataAdapter.FillFromCommand(Objectdata,Int32startRecord,Int32maxRecords,StringsrcTable,IDbCommandcommand,CommandBehaviorbehavior)

atSystem.Data.Common.DbDataAdapter.Fill(DataSetdataSet,Int32startRecord,Int32maxRecords,StringsrcTable,IDbCommandcommand,CommandBehaviorbehavior)

atSystem.Data.Common.DbDataAdapter.Fill(DataSetdataSet)