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- Overview
- Select
- Deleting a line in a Table control linked to a data file
- Managing calculated columns
- Retrieving the content of a row, column or cell
- Important
- Value of the cell in the current row
- Value of a cell in a specific row
- Content of the current row
- Content of row X
- Content of the selected rows for a multiple selection
Programming Table fields linked to a data file
Here are the main points for programming Table fields linked to a data file. WLanguage provides a number of functions for programmatically managing Table controls linked to a data file. A row can be selected with TableSelectPlus. If no stored item is defined for the Table control, you also have the ability to use the following syntax: <Table control> = <Number of row to select> Deleting a line in a Table control linked to a data file To delete a line in the Table control linked to a data file, use the TableDelete function. TableDelete deletes the corresponding record from the data file.
Important To delete a record in the data file, do not use the HDelete function, otherwise data in the data file will be lost. Managing calculated columns The calculation formula of a calculated column must be defined in the "Display a row" event of a Table control. Example of code in the "Display a row" event of the Table control:
IF COL_Stock < 200 THEN
COL_MsgAlerte = "Alerte"
ELSE
COL_MsgAlerte = ""
END
By definition, a Calculated control is not linked to a field: the value assigned by a line's display code is not memorized after dequeueing the Table control lines via the vertical scrollbar. For example, the "FOR ALL ROWS" instruction will not assign or retrieve the value of a calculated column from all Table control rows. If the Table control is a Table control linked to a data file but "Loaded in memory" (option "Loaded in memory" checked in the "Contents" tab of the control description window), the calculated columns will be memorized when the Table control is run. Retrieving the content of a row, column or cell Important The contents of a line in a Table control linked to a data file can be retrieved: - by retrieving the entire row.
- cell by cell.
Value of the cell in the current row The cell is identified by the name of the column. The following syntax must be used: Example:
IF COL_QTE < 10 THEN
Info("Quantité insuffisante")
END
Value of a cell in a specific row The cell is identified by the name of the column. The following syntax must be used: <Value> = <Column name>[<Row index>] Example:
PrixTotal = 0
FOR Indice = 1 TO TABLE_COMMANDE.Occurrence
PrixTotal = PrixTotal + COL_PHT[Indice]
END
Content of the current row The following syntax must be used: <Value> = <Table control> You also have the ability to use the following syntax: <Value> = <Table control>[<Table control>] Content of row X The following syntax must be used: <Value>=<Table control>[<Row index>] Remark: The line index can be given by the TableSelect function..
LigneEnCours = TABLE_CLIENT
NomCli = COL_NOM[TableSelect(TABLE_CLIENT)]
Content of the selected rows for a multiple selection The following syntax must be used: <Value>=<Table control>[<Row index>] Remark: To find out the indices of the selected lines, use functions TableSelectCount and TableSelect..
i is int
NbSelectionne is int = TableSelectCount(TABLE_Produit)
FOR i = 1 TO NbSelectionne
Trace("Ligne sélectionnée : " + ...
TABLE_Produit[TableSelect(TABLE_Produit, i)])
END
Note The Table control fields are not available: - If the Table control contains proportional scrollbars.
- If the Table control is "5.5 compatible".
- In Table controls displayed by Combo Boxes.
Note The Multiselection property indicates the selection mode of a Table control.
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