Mega Code Archive

Creating a lookup field in a tdbgrid for builder

Question: How do I create a lookup field in a TDBGrid in C++ Builder Answer: 1. Drop 2-TTable's, 1-TDataSource and 1-TDBGrid on a form. 2. Connect Table1 to DataSource1 to DBGrid1: In the object inspecter, set these attributes. a. DataSource1.DataSet = Table1 b. DBGrid1.DataSource = DataSource1 3. Setup Table1: In the object inspecter for Table1, set these attributes. a. DatabaseName = BCDEMOS b. TableName = Customer c. Active = True 4. Setup Table2: In the object inspecter for Table2, set these attributes. a. DatabaseName = BCDEMOS b. TableName = Orders c. Active = True 5. Add all of the fields for Table1 by bringing up the Fields Editor: a. Double click on Table1 b. Right click on Fields Editor c. Add Fields. Add all of them 6. Add a new field for Table1. a. Right click on Fields Editor, and select New Field. 7. Specify the following parameters for the newly added field. a. Name: CustOrder b. Type: String c. Size: 30 d. Select Lookup e. Key Fields: CustNo - Field in Table1 to store value f. DataSet: Table2 - Table lookup is being done on g: LookUpKeys: CustNo - This Key gets copied to KeyField h: Result Field: OrderNo - Value to display to the user in the drop down box 8. Run the application