New Id

I am using Microsoft Visual Studios 2005 Pro creating a web form in asp.net with a vb.net code page. I am trying to get the id of a newly inserted record. I am using the sqldatasource insert command to insert the record. Does anybody know how to return the new id. during the insert? Thanks, Any help is appreciated

there are basically 2 ways of doing that.

1. Create ID before you do insert using something like SELECT Max(id) +1 FROM ... Use this approach if you ID field is not set as a identity column

2. If your id field is an identity field then you can write a stored procedure that inserts the record and then you do something like

SET @.ID = scope_identity()

Where @.ID is your output parameter or you can return it as a return value.

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Here is a modified sample from Quickstarts tutorial with inline SQL for insert (ContactID is the Identity field of the table):

ProtectedSub SqlDataSource1_Inserted(ByVal senderAsObject,ByVal eAs System.Web.UI.WebControls.SqlDataSourceStatusEventArgs)

Response.Write("Record Inserted: " + Server.HtmlEncode(e.Command.Parameters("@.ContactID").Value.ToString()) +"<br/>")

EndSub

<asp:GridViewAutoGenerateColumns="False"DataKeyNames="ContactID"DataSourceID="SqlDataSource1"

ID="GridView1"runat="server">

<Columns>

<asp:CommandFieldShowDeleteButton="True"/>

<asp:BoundFieldDataField="ContactID"HeaderText="ContactID"InsertVisible="False"

ReadOnly="True"SortExpression="ContactID"/>

<asp:BoundFieldDataField="ContactName"HeaderText="ContactName"SortExpression="ContactName"/>

</Columns>

</asp:GridView>

<asp:SqlDataSourceConnectionString="<%$ ConnectionStrings:MSDN_forumConnectionString %>"ID="SqlDataSource1"

runat="server"SelectCommand="select ContactID, ContactName from Contacts"

InsertCommand="INSERT INTO Contacts (ContactName) VALUES (@.contactName);SELECT @.contactID = Scope_Identity()"

OnInserted="SqlDataSource1_Inserted"DeleteCommand="DELETE FROM Contacts WHERE ContactID = @.ContactID">

<InsertParameters>

<asp:ParameterName="contactName"Type="String"/>

<asp:ParameterDirection="Output"Name="contactID"Type="Int32"/>

</InsertParameters>

<DeleteParameters>

<asp:ParameterName="ContactID"/>

</DeleteParameters>

</asp:SqlDataSource>

<br/>

<asp:DetailsViewAutoGenerateRows="False"DataKeyNames="ContactID"DataSourceID="SqlDataSource1"

DefaultMode="Insert"HeaderText="Insert New Contact"Height="50px"ID="DetailsView1"

runat="server"Width="125px">

<Fields>

<asp:BoundFieldDataField="ContactID"HeaderText="ContactID"InsertVisible="False"

ReadOnly="True"SortExpression="ContactID"/>

<asp:BoundFieldDataField="ContactName"HeaderText="ContactName"SortExpression="ContactName"/>

<asp:CommandFieldShowInsertButton="True"/>

</Fields>

</asp:DetailsView>

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orka777:

there are basically 2 ways of doing that.

1. Create ID before you do insert using something like SELECT Max(id) +1 FROM ... Use this approach if you ID field is not set as a identity column

2. If your id field is an identity field then you can write a stored procedure that inserts the record and then you do something like

SET @.ID = scope_identity()

Where @.ID is your output parameter or you can return it as a return value.

For Number 1, is correct but might no be that good even it will do the job for you.

For Number 2, the code should be like:

1SET @.MyIdentity =@.@.IDENTITY

Where @.MyIdentity in an output parameter of type int.

Here I prefere to not return the identity of the inserted record as an output parameter, I perefere to return it using the Return statment in the stored procedure., like:

1CREATE PROCEDURE MySP23AS45SET NOCOUNT ON67declare MyIdentityint-- as a normal variable in the stored procedure body89Insert Into MyTable (col1, col2)values ('A','B')10SET @.MyIdentity =ISNULL(@.@.IDENTITY,-1)-- if no record is inserted then you will get -1111213Return @.MyIdentity1415SET NOCOUNT OFF16

Good luck.|||

I am trying to do this through the sqldatasource1.insert statement that I have built using the querybuilder. When I try to put in the @.ID as an output or as a return value It says I need to declare the scalar variable. I have already added in the parameters area and it is set to output with the control being the textbox that I want the Id in. But when I add the line "SET @.NewID = scope_identity()" or "SET @.NewID = @.@.identity" then I get an error on both @.NewId and @.SN which is another scalar variable which normally works fine and works fine again after I pull that line out. But I'm not doing it as a stored procedure. Could that be the problem? I don't know about stored procedures. How do I create them?

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Carehalf:

I don't know about stored procedures. How do I create them?

Just check my last post, it is a complete running fine example.

Anyway.. here is a very simple example:

1CREATE PROCEDURE MyStoredProcedureName2@.MyInputParameterint,-- input parameter of type integer3@.MyOutputParameterint OUTPUT-- output parameter of type integer45AS67-- write you statments here8-- and here9-- and here as well :)1011-- how to set a value for ourput parameter12SET @.MyOutputParameter = 100-- just for example1314-- how to increment the input parameter by 1 (for example)15SET @.MyInputParameter = @.MyInputParameter + 1161718/* At the end you the @.MyOutputParameter output parameter value19 will be 100 (as per the logic in this simple example20 Did you see how easy it is to created a stored procedure? */21

Good luck.

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I understand the stored procedure from looking at your last statement and this one, but I am not sure where to create it

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Carehalf:

I understand the stored procedure from looking at your last statement and this one, but I am not sure where to create it

Create you stored procedures in your application/project database.

Example:

USE MyDatabase
GO

Then the CREATE PROCEDURE statment as in my last two posts.

Good luck.

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Carehalf:

Create a table in your database and copy the code sample I posted (change the connection string in the code) and check the syntax to work for you if you don't want to create the Stored Procedure.

Here is the table definition:

CREATETABLE [dbo].[Contacts](

[ContactID] [int]IDENTITY(1,1)NOTNULL,

[ContactName] [nvarchar](50)

)