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samesdavis

[Resolvido] Recuperar chave primária por GetSchema

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samesdavis

Boa tarde,

 

Preciso recuperar qual é o nome do campo da chave primária de uma tabela usando GetSchema.

Estou usando este código em C# .  A base de dados é SQL Server.

 

Nesse método abaixo eu passo como parâmetro o nome da tabela. 

 

        public string BuscaChave(string mTabela)
        {
            //Cria a conexão
            using (SqlConnection sqlConnection = CriarConexao())
            {
                try
                {

                    //Abre a conexão
                    sqlConnection.Open();
                    DataTable dataTable = sqlConnection.GetSchema("Indexes", new[] { null, null, mTabela });
                    string mChave = string.Empty;
                    foreach (DataRow linha in dataTable.Rows)
                    {
                        mChave = linha.ItemArray[3].ToString();
                        break;
                    }
                    return mChave;

                }
                catch (Exception ex)
                {
                    //retorna mensagem de erro
                    throw new Exception(ex.Message);
                }
                finally
                {
                    //Fecha a conexão
                    sqlConnection.Close();
                }

            }
        }

 

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Rechousa

Viva,

Se por GetSchema não for um requisito, aqui vai uma solução:

SELECT COLUMN_NAME
	FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
	WHERE OBJECTPROPERTY(OBJECT_ID(CONSTRAINT_SCHEMA + '.' + QUOTENAME(CONSTRAINT_NAME)), 'IsPrimaryKey') = 1
	AND TABLE_NAME = 'table_name' AND TABLE_SCHEMA = 'schema_name'

Espero ter ajudado,

 

  • Vote 1

Pedro Martins

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