Question

ExecuteReader: CommandText 属性尚未初始化

ExecuteReader: CommandText 属性尚未初始化
说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.InvalidOperationException: ExecuteReader: CommandText 属性尚未初始化

源错误:

行 125: SqlDataAdapter myCommand = new SqlDataAdapter(sqlstr, conn);
行 126: DataSet ds = new DataSet();
行 127: myCommand.Fill(ds, "JournalArticalID");
行 128: GridView1.DataSource = ds.Tables["JournalArticalID"].DefaultView;
行 129: GridView1.DataBind();

源文件: e:\2011.2.18\论著及专利\Journal.aspx.cs 行: 127

堆栈跟踪:

[InvalidOperationException: ExecuteReader: CommandText 属性尚未初始化]
System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) +5034359
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +87
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +141
System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +12
System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) +10
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +144
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +319
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +92
论著及专利管理_Journal.BindGrid(String sqlstr) in e:\2011.2.18\论著及专利\Journal.aspx.cs:127
论著及专利管理_Journal.Page_Load(Object sender, EventArgs e) in e:\2011.2.18\论著及专利\Journal.aspx.cs:32
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +91
System.Web.UI.Control.LoadRecursive() +74
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

小弟初学乍道，请高人指点，不知错在哪里？

Answer 1

sql语句没写好吧，或者没初始化……

Answer 2

sqlstr有问题，可能为null

Answer 3

我告诉你 你把你那个破sqlconnetion分开写 别都调用一个 每查询一次就写一个 分拿来....