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SCOPE_IDENTITY from tableadapter schema

Posted on 2006-05-19
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Last Modified: 2012-08-13
Hi All!

I am using a generated class from some tables into a visual studio 2005 project. Now, one of this tables uses a recently created id from another table. How can i get this value to insert it into this table?

I saw that the insert uses the scope_identity() but i couldnt see any way to recover this value.

thx in advance!
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Question by:FLUXWIRE
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6 Comments
 
LVL 13

Expert Comment

by:devsolns
ID: 16717225
Im not sure what you mean by "recover this value,


--insert statement here.

Declare   @identity int


    --INSERT INTO ...
    set @identity = SCOPE_IDENTITY()

   --Do whatever you want with @identity here.

Your on target, do NOT use @@identity!
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Author Comment

by:FLUXWIRE
ID: 16717620
Hi. thx for your attention.

this is how the insert is used by the tableadapter:

            this._adapter.InsertCommand = new System.Data.SqlClient.SqlCommand();
            this._adapter.InsertCommand.Connection = this.Connection;
            this._adapter.InsertCommand.CommandText = @"INSERT INTO [dbo].[OCORRENCIAS] ([id_tipo], [assunto], [dtpublicacao], [paginas], [documento]) VALUES (@id_tipo, @assunto, @dtpublicacao, @paginas, @documento);
SELECT id_ocorrencia, id_tipo, assunto, dtpublicacao, paginas, documento FROM OCORRENCIAS WHERE (id_ocorrencia = SCOPE_IDENTITY())";
            this._adapter.InsertCommand.CommandType = System.Data.CommandType.Text;
            this._adapter.InsertCommand.Parameters.Add(new System.Data.SqlClient.SqlParameter("@id_tipo", System.Data.SqlDbType.Decimal, 0, System.Data.ParameterDirection.Input, 18, 0, "id_tipo", System.Data.DataRowVersion.Current, false, null, "", "", ""));
            this._adapter.InsertCommand.Parameters.Add(new System.Data.SqlClient.SqlParameter("@assunto", System.Data.SqlDbType.NVarChar, 0, System.Data.ParameterDirection.Input, 0, 0, "assunto", System.Data.DataRowVersion.Current, false, null, "", "", ""));
            this._adapter.InsertCommand.Parameters.Add(new System.Data.SqlClient.SqlParameter("@dtpublicacao", System.Data.SqlDbType.DateTime, 0, System.Data.ParameterDirection.Input, 0, 0, "dtpublicacao", System.Data.DataRowVersion.Current, false, null, "", "", ""));
            this._adapter.InsertCommand.Parameters.Add(new System.Data.SqlClient.SqlParameter("@paginas", System.Data.SqlDbType.NVarChar, 0, System.Data.ParameterDirection.Input, 0, 0, "paginas", System.Data.DataRowVersion.Current, false, null, "", "", ""));
            this._adapter.InsertCommand.Parameters.Add(new System.Data.SqlClient.SqlParameter("@documento", System.Data.SqlDbType.NVarChar, 0, System.Data.ParameterDirection.Input, 0, 0, "documento", System.Data.DataRowVersion.Current, false, null, "", "", ""));

and this is the routine that i use to execute the query

 [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        [System.ComponentModel.Design.HelpKeywordAttribute("vs.data.TableAdapter")]
        [System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Insert, true)]
        public virtual int Insert(decimal id_tipo, string assunto, System.Nullable<System.DateTime> dtpublicacao, string paginas, string documento) {
            this.Adapter.InsertCommand.Parameters[0].Value = ((decimal)(id_tipo));
            if ((assunto == null)) {
                this.Adapter.InsertCommand.Parameters[1].Value = System.DBNull.Value;
            }
            else {
                this.Adapter.InsertCommand.Parameters[1].Value = ((string)(assunto));
            }
            if ((dtpublicacao.HasValue == true)) {
                this.Adapter.InsertCommand.Parameters[2].Value = ((System.DateTime)(dtpublicacao.Value));
            }
            else {
                this.Adapter.InsertCommand.Parameters[2].Value = System.DBNull.Value;
            }
            if ((paginas == null)) {
                this.Adapter.InsertCommand.Parameters[3].Value = System.DBNull.Value;
            }
            else {
                this.Adapter.InsertCommand.Parameters[3].Value = ((string)(paginas));
            }
            if ((documento == null)) {
                this.Adapter.InsertCommand.Parameters[4].Value = System.DBNull.Value;
            }
            else {
                this.Adapter.InsertCommand.Parameters[4].Value = ((string)(documento));
            }
            System.Data.ConnectionState previousConnectionState = this.Adapter.InsertCommand.Connection.State;
            if (((this.Adapter.InsertCommand.Connection.State & System.Data.ConnectionState.Open)
                        != System.Data.ConnectionState.Open)) {
                this.Adapter.InsertCommand.Connection.Open();
            }
            try {
                int returnValue = this.Adapter.InsertCommand.ExecuteNonQuery();
                return returnValue;
            }
            finally {
                if ((previousConnectionState == System.Data.ConnectionState.Closed)) {
                    this.Adapter.InsertCommand.Connection.Close();
                }
            }
        }

this is generated by the wizard.

the insert routine returns the number of the rows affected.
how can i get (sorry about the recover) the SCOPE_IDENTITY?

Thx in advance!
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LVL 13

Expert Comment

by:devsolns
ID: 16718203
you should without a doubt create a stored procedure for this..

it would like like

//pseudo tsql

dbo.sprocname {
     @param1 int,
     @param2 varchar(50),
     @param3 datetime
as
   insert into mytable values(@param1, @param2);
   insert into mytable2 values(scope_identity(), @param3);
   //you could return scope_identity with return statement or out param.
}
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Author Comment

by:FLUXWIRE
ID: 16718813
k. let me ask you a workaround for it.
in the generated tableadapter class, could i do this?
1. create a new int variable, private,
2. put another select in the same command text, like
SET variable = SCOPE_IDENTITY()";
3. return this variable in the insert method.

if i could do this, i could use it. i dont know how could i do the second item.

thx in advance.

0
 

Author Comment

by:FLUXWIRE
ID: 16728003
i got it!

after you use the adapter.update(); the related table has the last record. all i need to do is table.Rows[0][0] and i got the primary key.

Look at commandtext. we have 2 commands. the first one is the insert and in the sequence, the select.
works!

thx
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