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creacion de bases de datos en visual basic hola yo soy novato en esto y me gustaria me ayudaran en esto ¿como ago bases de datos y luego como las leo para buscar los registros en una pantalla de visual basic? espero le entiendan a mi pregunta y me puedan ayudar gracias. |
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Re: creacion de bases de datos en visual basic la forma mas usada es la siguiente crea la base de datos con msacces y guardala en formato acces 97 inicia VB y crea una nueva aplicacion inserta un formulario con el asistente y este te guiara paso a paso para conectar tu base de datos. cuando este termine tendras un buen ejemplo de como hacer lo que quieres ;) |
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Respuesta: creacion de bases de datos en visual basic 'Procedimiento para crear una tabla Public Sub CrearTabla(pathBD As String, file_dbf As String) ' Declaro los objetos DAO a utilizar: Dim db As DAO.Database Dim tblDef As DAO.TableDef Dim fld As DAO.Field Dim idx As DAO.Index ' Abro la base de datos: ' (cambiar si el archivo está en otra ubicación) Set db = OpenDatabase(pathBD) ' Creo la tabla Set tblDef = db.CreateTableDef(file_dbf) ' Defino las columnas de la tabla: ' (para cada una, indico el nombre de la columna ' y el tipo de dato, y luego la agrego a la ' colección Fields) Set fld = tblDef.CreateField("ContactID", dbLong) fld.Attributes = fld.Attributes + dbAutoIncrField tblDef.Fields.Append fld Set fld = tblDef.CreateField("SAMP_ID", dbText, 25) tblDef.Fields.Append fld Set fld = tblDef.CreateField("STUDY_ID", dbText, 50) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SURVEY_ID", dbText, 25) tblDef.Fields.Append fld Set fld = tblDef.CreateField("TIDAL_STAGE", dbText, 25) tblDef.Fields.Append fld Set fld = tblDef.CreateField("STATION_ID", dbText, 12) tblDef.Fields.Append fld Set fld = tblDef.CreateField("GEAR_TYPE", dbText, 5) tblDef.Fields.Append fld Set fld = tblDef.CreateField("DEPTH_TOP", dbLong) tblDef.Fields.Append fld Set fld = tblDef.CreateField("DEPTH_BOT", dbLong) tblDef.Fields.Append fld Set fld = tblDef.CreateField("DEPTH_UNIT", dbText, 12) tblDef.Fields.Append fld Set fld = tblDef.CreateField("MATRIX", dbText, 3) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FIELD_QC_CODE", dbText, 3) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FIELD_PROCESS", dbText, 1) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SOIL_TYPE", dbText, 5) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SOIL_DESCR", dbText, 50) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SOIL_COLOR", dbText, 12) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SAMP_COLLECTOR", dbText, 3) tblDef.Fields.Append fld Set fld = tblDef.CreateField("DATE_RECORD_CREATED", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("START_DATE", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("START_TIME", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("END_DATE", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("END_TIME", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("TIME_ZONE", dbText, 25) tblDef.Fields.Append fld Set fld = tblDef.CreateField("TRANSCRIBED_RECORD_YN", dbText, 1) tblDef.Fields.Append fld Set fld = tblDef.CreateField("Comments", dbText, 150) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FLDMOD_QAQCACCEPT", dbText, 1) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FLDMOD_QAQCREVBY", dbText, 3) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FLDMOD_QAQCREVDATE", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("DATA_STATUS", dbText, 5) tblDef.Fields.Append fld Set fld = tblDef.CreateField("LOGIN_ID", dbText, 10) tblDef.Fields.Append fld Set fld = tblDef.CreateField("FileName", dbText, 50) tblDef.Fields.Append fld Set fld = tblDef.CreateField("LOAD_DATE", dbDate) tblDef.Fields.Append fld Set fld = tblDef.CreateField("SCRIPT_NAME", dbText, 25) tblDef.Fields.Append fld ' Defino un índice para la clave primaria: Set idx = tblDef.CreateIndex("PK_Temas") ' Defino las dos columnas que componen la clave: ' (Fields1 + Fields2) Set fld = idx.CreateField("SAMP_ID") idx.Fields.Append fld Set fld = idx.CreateField("STUDY_ID") idx.Fields.Append fld ' Asigno este índice como clave primaria: idx.Primary = True tblDef.Indexes.Append idx ' Defino otro índice que sirva para ' buscar temas por nombre: Set idx = tblDef.CreateIndex("IDX_Nombre_Tema") Set fld = idx.CreateField("STATION_ID") idx.Fields.Append fld tblDef.Indexes.Append idx ' Incorporo la tabla nueva en la colección ' de tablas de la base de datos: db.TableDefs.Append tblDef db.Close End Sub |
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