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Working with DBFields

In a query-based report, the DBFields or database fields refer to fields directly from databases, user data sources, hierarchical data sources, or other data resources; in a business view-based report, they are the group and details objects in the business view. This topic introduces how you can insert DBFields in a report and use the DBField features.

For the DBFields in a report, you can use them as the trigger object of links, and change their display types if you want.

This topic contains the following sections:

• Inserting DBFields in a Report
• Adding Summaries for DBFields
• Adding Conditional Formatting to DBFields
• Searching for DBFields in a Report

See an example: The SampleComponents catalog, included with Designer, contains reports that have examples of how you could use each component type in a report. For the DBField component example, open <install_root>\Demo\Reports\SampleComponents\ForDBField.cls.

Inserting DBFields in a Report

You can insert DBFields in the report areas listed in Component Placement.

For a business view-based report

In the Data panel, select the group or detail object and drag it to the destination.

For a query-based report

You have two ways to insert a DBField into a query-based report.

• By dragging and dropping
  In the Data panel, select a dataset from the dataset drop-down list, then select the required DBField and drag it to the destination.
• Using dialog box
  1. Position the mouse pointer at the destination where you want to insert the DBField.
  2. Select Insert > DBField or Home > Insert > DBField. Designer displays the Insert Fields dialog box.

     

  3. Select a dataset from the dataset drop-down list. Designer then lists all resources in the selected dataset in the DBField List box.
  4. Select the required DBField and specify its layout in the Insert Layout box. You can select them one by one with the Ctrl key, or you can make a continuous selection with the Shift key.
  5. Select Insert to insert the DBField into the destination.

• You cannot use the Insert Fields dialog box to insert a DBField into a crosstab.
• If you insert a DBField into the detail panel of a banded object or table, Designer adds the name of the DBField automatically into the corresponding header panel; otherwise, Designer places the field and its name label in the same panel. If you do not want Designer to insert the name label automatically, clear "Insert field name label with field" in the Component category of the Options dialog box.

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Adding Summaries for DBFields

In a query-based page report, you can add summaries for DBFields.

1. Select a DBField, then do one of the following:
   • Select Insert > Summary.
   • Right-click the DBField and select Summary Function from the shortcut menu.

   Designer displays the Insert Summary dialog box.

   

2. From the Aggregate Function drop-down list, select the function of the summary. If you select DistinctSum, you should select the ellipsis next to the Distinct On text box to specify one or more fields according to whose unique values to calculate DistinctSum using the Select Fields dialog box.
3. If the report is grouped, select to which group level you want to apply the summary from the Group By drop-down list. If you select None, Designer adds the summary based on the whole report.
4. Select Insert.

   Designer then creates a summary with the default name "Function_DBFieldName" in the current catalog. The summary is also available under the Summaries node in the Data panel. You can drag it to use in the report.

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Adding Conditional Formatting to DBFields

You can add conditional formatting to DBFields in a report, then in the report result, the field values that meet a specified condition automatically apply the formatting you define for the condition. This is very useful to highlight values that users may need to act on at runtime.

To apply conditional formatting to a DBField:

1. Select the DBField and then do one of the following:
   • Select Conditional Formatting on the Format menu tab.
   • Right-click the DBField and select Conditional Formatting from the shortcut menu.

   Designer displays the Conditional Formatting dialog box.

   

2. Select Add . Designer displays the Edit Conditions dialog box.

   

3. Select Add Condition to add a condition line.
4. From the field drop-down list, select the field on which to create the condition. You can also select the special field "User Name" or Page Number to compose the condition. If you select Page Number, Logi Report Engine applies the format to the field values on the pages that meet the condition at runtime.
5. Choose the operator with which to compose the condition expression from the operator drop-down list.
6. From the value drop-down list, specify the value of how to build the condition. You can also type the value manually.

   When you are adding conditional formatting to a DBField in a crosstab, you can select and then select an object from the drop-down list to use its value in the condition. Designer provides the following objects that are of the same data type as the field on which the condition is based in the drop-down list:

   • Crosstab formulas if the crosstab uses a query resource
   • Dynamic resources and aggregation objects if the crosstab uses a business view

   You can specify an empty string as the value for a field of String type, by simply leaving the text box blank (value length=0). If you would like to filter space string (one or more spaces) and empty string, create a formula with the statement Trim(@Field) which transforms the spaces into empty string, then use the formula to replace the field itself on which the condition is based.

7. Repeat steps 3 to 6 to add more condition lines and define the logic relationship between the condition lines: "And", "Or", "And Not", or "Or Not".

   To group some condition lines, select them and select Group, Designer then adds the selected condition lines in one group and applies them as one line of filter expression (you can also group conditions and groups together); to take out any condition or group from a group, select it and select Ungroup; to adjust the priority of the condition lines, select it and select Up or Down; to delete a condition line, select it and select Delete.

8. Select OK to save the condition.

   Designer then displays and highlights the newly added condition in the Condition box in the Conditional Formatting dialog box.

9. In the Format box, specify the formatting you want to apply to the field values that meet the condition, such as the font face, font size, and font color. Select Blinking Text if you want to make the values blink, then in the Duration text box, set how long it takes the values to complete the transition from the foreground color to the transparent color, in seconds. The blink settings can work in Designer view mode, in the HTML output of the report, and at runtime.
10. Repeat the above steps to add more conditions and define the formatting for each condition.

    To edit a condition, select the condition from the Condition box, select Edit , then edit the condition in the Edit Conditions dialog box.

    To adjust the priority of the conditions, select a condition and select High or Low.

    To delete a condition and the corresponding formatting, select the condition in the Condition box and then select Remove .

11. Select OK to save the settings.

To make the blink settings take effect in HTML output and at runtime, you need to make sure the web browser you use supports CSS3 animation, such as Firefox, Safari, Chrome, and Internet Explorer 10 or above.

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Searching for DBFields in a Report

When a report has many DBFields, you may find it difficult to locate where a certain field is. To easily find out the field you have lost track of in your report, you can use the Find DBField feature.

To find a DBField in a report:

1. Select Home > Find. Designer displays the Find dialog box.

   

2. Select the field you want to locate from the Find What drop-down list.

   Besides DBFields, Designer also lists the formula fields used in the report in the Find What drop-down list, so you can also use this dialog box to locate a formula in a report.

3. Specify the criteria with which to find the field.
   • Root
     Select to search for the field from the top node.
   • Current Node
     Select to search for the field from the current node.
4. Select Find Next and Designer selects the specified field in the report.

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