dim conn as oledbconnection
conn=new oledbconnection
conn.connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="&Server.MapPath("user.mdb")
conn.Open
dim da as OledbDataAdapter
dim ds as new DataSet
da=new OledbDataAdapter("select * from tmb",conn)
da.Fill(ds,"tmb1") <——————执行到这里报错错误信息:
Server Error in '/test' Application.
--------------------------------------------------------------------------------Value cannot be null. Parameter name: dataSet
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentNullException: Value cannot be null. Parameter name: dataSetSource Error:
Line 221: da = New OleDbDataAdapter("select * from tmb", conn)
Line 222: Dim ds As DataSet
Line 223: da.Fill(ds, "tmb1")
Line 224: End Sub
Line 225:
Source File: E:\mysite\test\WebForm1.aspx.vb Line: 223 Stack Trace:
[ArgumentNullException: Value cannot be null.
Parameter name: dataSet]
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable)
test.WebForm1.Page_Load(Object sender, EventArgs e) in E:\mysite\test\WebForm1.aspx.vb:223
System.Web.UI.Control.OnLoad(EventArgs e)
System.Web.UI.Control.LoadRecursive()
System.Web.UI.Page.ProcessRequestMain()
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
conn=new oledbconnection
conn.connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="&Server.MapPath("user.mdb")
conn.Open
dim da as OledbDataAdapter
dim ds as new DataSet
da=new OledbDataAdapter("select * from tmb",conn)
da.Fill(ds,"tmb1") <——————执行到这里报错错误信息:
Server Error in '/test' Application.
--------------------------------------------------------------------------------Value cannot be null. Parameter name: dataSet
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentNullException: Value cannot be null. Parameter name: dataSetSource Error:
Line 221: da = New OleDbDataAdapter("select * from tmb", conn)
Line 222: Dim ds As DataSet
Line 223: da.Fill(ds, "tmb1")
Line 224: End Sub
Line 225:
Source File: E:\mysite\test\WebForm1.aspx.vb Line: 223 Stack Trace:
[ArgumentNullException: Value cannot be null.
Parameter name: dataSet]
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable)
test.WebForm1.Page_Load(Object sender, EventArgs e) in E:\mysite\test\WebForm1.aspx.vb:223
System.Web.UI.Control.OnLoad(EventArgs e)
System.Web.UI.Control.LoadRecursive()
System.Web.UI.Page.ProcessRequestMain()
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
Dim ds As DataSet = New DataSet
Dim ds As DataSet = New DataSet
Dim ds As DataSet=new DataSet
出错的原因是dataset没有初始化
Dim ds As DataSet-->Dim ds As DataSet=New DataSet
dim ds as new DataSet
da=new OledbDataAdapter("select * from tmb",conn)
da.Fill(ds,"tmb")