The Web DataWindow DTC can pass data in query strings to a target page. You can use the Link To tab page in the Sybase Web DataWindow DTC Properties dialog box to generate hyperlinks around headers and labels, computed fields that are not calculated on the client, graphical elements in a DataWindow, or read-only columns.
You can change a column to read-only by setting its tab order to 0, its Protect property to 1, or its Edit.DisplayOnly property to Yes. Hyperlinks can also be set around text objects that use DataWindow expressions to display data from database columns.
When you click in the Link To column next to a DataWindow object, a browse (...) button displays to the right in the row that you clicked. The browse button opens the Link Definition dialog box, where you specify the target page for the link and the data to bind to target page parameters.
The types of values you can pass to the target page from a DataWindow object are:
Control Select this to pass the value of any control from the current page to the target page. The initial value of the control is passed, even if the control is editable at runtime. You can use a control as a bind type in a 4GL Web page only.
Constant Use a constant when you know the value you want to pass to the target page. Type the value directly in the Bind Value column of the Link Definition dialog box.
Database column Use a database column when you want to pass data for a column from the row a user clicks. You can bind column data to any DataWindow object you select on the Link To tab. If you select a column (label) as the DataWindow object link, the column value you bind is not restricted to the column you selected for the link; you can pass data from another column, such as a column that is not displayed.
DataWindow Expression Use a DataWindow expression to pass a value derived from retrieved data for the DataWindow.
JavaScript Expression Use a script variable when you want to pass a value that was calculated in a previously-run server script on the current page, or that you can specify as an expression. The variable's value is not derived from the retrieved data for the DataWindow, although it could refer to other data you have retrieved. You cannot use a JavaScript expression as a bind type in a JSP target.
Page Parameter Use a page parameter when you want to pass on, as is, to the target page, a value that was passed to the current page. The value is not derived from the retrieved data for the DataWindow.
Page Variable Use a page variable to pass on the value of a variable on the current page. You can use a variable as a bind type in a 4GL Web page only.
To link to parameters on other pages
Right-click on a Web DataWindow DTC and select Sybase Web DataWindow DTC Properties.
Click the Link To tab.
Select a DataWindow object to link to (for example, a header or a picture).
Click under the Link To column for the object you selected.
An ellipsis button displays in the row where you clicked.
Click the ellipsis button.
The Link Definition dialog box displays.
Click the browse (...) button to open the Choose URL dialog box, select a Web page or file to which you want to link, and click OK.
You return to the Link Definition dialog box. The name of the target page displays in the URL box. Existing parameters on the target page display under the Name column. You can type in additional parameters, but you need to define them later on the target page.
Select a bind type (for one of the target page parameters) from the Bind Type drop-down list.
The Bind Value drop-down list is automatically populated for certain bind type selections.
Select or type a value in the Bind Value drop-down list, and click OK.
