ObjectDataSource 'ObjectDataSource1' could not find a non-generic method 'updateEvent' that has parameters


I am a J2EE developer who is now look at ASP.NET 2. I have written two very basic aspx pages and a Eventsdb.cs as the data access layer. However I have encountered the following error when the broswer redirect to the second aspx page :

"ObjectDataSource 'ObjectDataSource1' could not find a non-generic method 'updateEvent' that has parameters".

The first aspx page tags are as follows:

<form id="form1" runat="server">


<div style="width: 594px; height: 37px">

<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="ObjectDataSource1"

DataTextField="FreeOfCharge" DataValueField="FreeOfCharge" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack=true>


<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="getFreeOfCharge"




<div style="width: 593px; height: 283px">

&nbsp;<asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource2" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="GUID">


<asp:BoundField DataField="Title" HeaderText="Title" />

<asp:BoundField DataField="ContactName" HeaderText="Contact Name" />

<asp:BoundField DataField="FreeOfCharge" HeaderText="Free" />

<asp:HyperLinkField DataNavigateUrlFields="GUID" DataNavigateUrlFormatString="AccessDataLayerExample1dot2.aspx?ID={0}"

HeaderText="Edit" Text="Edit" />

<asp:BoundField DataField="GUID" Visible="False" />



<asp:ObjectDataSource ID="ObjectDataSource2" runat="server" SelectMethod="getEventsFromFreeOfCharge"



<asp:ControlParameter ControlID="DropDownList1" Name="foc" PropertyName="SelectedValue"

Type="String" />






The AccessDataLayerExample1dot2.aspx html is as follows:

<form id="form1" runat="server">


<div style="width: 612px; height: 290px">

&nbsp; &nbsp;

<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateEditButton="True" AutoGenerateRows="False"

DataSourceID="ObjectDataSource1" DefaultMode="Edit" Height="50px" Width="125px">


<asp:BoundField DataField="GUID" HeaderText="GUID" ReadOnly="True" Visible="False" />

<asp:BoundField DataField="Title" HeaderText="Title" />



<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="getEvent"

TypeName="EventsDB" UpdateMethod="updateEvent">


<asp:QueryStringParameter Name="GUID" QueryStringField="ID" Type="String" />






Finally the access data layer's update method is as follows:

public static int updateEvent(String GUID, String Title)


String connString = ConfigurationManager.ConnectionStrings["commerce"].ConnectionString;

//String query = "UPDATE [GLOBAL_Events2_Events] SET [Title] = @Title, [ContactName] = @ContactName, [ContactTel] = @ContactTel, [FreeToCharge] = @FreeOfCharge WHERE ([GLOBAL_Events2_Events].[GUID] = @GUID)";

   String query = "UPDATE [GLOBAL_Events2_Events] SET [Title] = @Title WHERE ([GLOBAL_Events2_Events].[GUID] = @GUID)";

IDbConnection idbConn = new System.Data.SqlClient.SqlConnection(connString);

IDbCommand idbComm = new System.Data.SqlClient.SqlCommand();

idbComm.CommandText = query;

idbComm.Connection = idbConn;

// Create the parameters to pass to the update statement

IDbDataParameter guidParm = new System.Data.SqlClient.SqlParameter();

guidParm.DbType = DbType.String;

guidParm.ParameterName = "@GUID";

guidParm.Value = GUID;


IDbDataParameter titleParm = new System.Data.SqlClient.SqlParameter();

titleParm.DbType = DbType.String;

titleParm.ParameterName = "@Title";

titleParm.Value = Title;


int rowsAffected = 0;

// we need to open the db connection because the update statement requires this




rowsAffected = idbComm.ExecuteNonQuery();






return rowsAffected;


12/10/2005 5:18:18 PM
asp.net.object-datasource 16182 articles. 0 followers. Follow

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