使用OleDbCommandBuilder时访问SQL语法错误
我将使用C#中的OleDbDataAdapter在Access数据库中插入数据但是我在INSERT INTO命令中出现错误消息语法错误
BackgroundWorker worker = new BackgroundWorker(); OleDbDataAdapter dbAdapter new OleDbDataAdapter(); OleDbConnection dbConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\\PMS.mdb"); worker = new BackgroundWorker(); worker.WorkerReportsProgress = true; worker.DoWork += InsertJob; worker.ProgressChanged += InsertJobCompleted; worker.RunWorkerAsync(args);
而InsertJob函数是:
private void InsertJob(object sender, DoWorkEventArgs e) { var args = (InsertJobArgs)e.Argument; try { dbAdapter.SelectCommand = new OleDbCommand("SELECT * FROM Sheet", dbConnection); dbAdapter.Fill(args.DataTable); var builder = new OleDbCommandBuilder(dbAdapter); var row = args.DataTable.NewRow(); row["UserName"] = args.Entry.UserName; row["Password"] = args.Entry.Password; args.DataTable.Rows.Add(row); dbAdapter.InsertCommand = builder.GetInsertCommand(); dbAdapter.Update(args.DataTable); builder.Dispose(); } catch (Exception ex) { args.Exception = ex; worker.ReportProgress(0, args); return; } worker.ReportProgress(100, args); }
我在线收到错误: dbAdapter.Update(args.DataTable);
我尝试使用visual studio调试它,发现所有InsertCommand参数值都为null
在调用dbAdapter.Update(args.DataTable);
之前,我试图通过此代码手动插入它dbAdapter.Update(args.DataTable);
dbAdapter.InsertCommand.Parameters[0].Value = args.Entry.UserName; dbAdapter.InsertCommand.Parameters[1].Value = args.Entry.Password;
试试这个:
紧接着就行了
var builder = new OleDbCommandBuilder(dbAdapter);
添加两行
builder.QuotePrefix = "["; builder.QuoteSuffix = "]";
这将告诉OleDbCommandBuilder
将表和列名称包装在方括号中,生成一个INSERT命令
INSERT INTO [TableName] ...
而不是默认forms
INSERT INTO TableName ...
如果任何表或列名称包含空格或“有趣”字符,或者它们恰好是Access SQL中的保留字,则必须使用方括号。 (在您的情况下,我怀疑您的表有一个名为[Password]的列,而PASSWORD
是Access SQL中的保留字。)