Grid Update Maintenance Template


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Template Notes
Runtime Walkthrough
Template In-Action
Application Properties
Web Parameters

As it sounds, this template allows maintenance directly on a grid of records with the ability to edit and/or delete multiple records at once. This template makes it simple to create powerful, user-friendly interfaces for maintaining data.

Features that Apply to All m-Power Templates

Features that Apply to the Grid Update Maintenance Template

All Templates Features

Query Database Table:
m-Power templates allow you to retrieve rows of data from one or more database tables or database views. Utilizing SQL statements, m-Power connects to your database and allows you to access the data via a web application.
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Ad Hoc Template Specific:
m-Power templates allow the end user to sort the data fetched from the database. Ascending or descending order can be controlled from the table heading by clicking the up or down arrows. To turn this feature on or off, access the application properties and select Yes or No for the advancedSort property.
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Format Numeric Data:
m-Power templates allow developers to easily modify the numeric format of fields to better suit your needs, directly from the interface. An example of this can be the use of a comma at the thousand decimal point: (2,000) or the inclusion of decimal digits: (2,000.00) From the application menu, click Field Settings. For numeric fields you will see a Numeric Field Format column, use the drop down to select the numeric format you need.
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Filter Via Record Selections:
Create hard-coded or user interactive filters based on specific criteria from your data. This feature allows users to filter the data to display only those records that match the selection criteria. Several options are available to create the relationship of the search, including "equal to, not equal to, is in the list, is in the range" and many more. Learn more.
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Add Multi-Tenant Security:
m-Power applications can be secured to allow different users to access the same application, but see different results, based on the user login credentials. One example of this can be a report that contains records of customers for all the States in the USA, but the user will only work with the customers in his/her home State, via row level security m-Power can filter and display only the customers that the user is allowed to see. This technique allows you to fully implement scalable security solutions. Learn more.
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Override/Customizable Error Messages:
All m-Power templates allow you to modify the default error messages. Most error messages are generic in describing the issue, maybe you need your users to see a more personalized or informative error message. From the application properties developers can change the error message without having to open the code source of the application. Learn more.
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Add Drop-Down List or Lookup List to Text Input Fields:
Add a drop down list or lookup window to your application using m-Painter. These features will allow users to input data by selecting it from a list or lookup windows. This enhances the user experience, simplifies their tasks, and allow for less errors on data input. Learn more about Lookup Windows. Learn more about Dropdowns.
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Add Calendar Widget to Date Inputs:
Using m-Painter developers can add a calendar picker next to a date input field. The date format in the calendar picker can be modified to match the format in the database. This feature will save users time and it will ensure that the date format entered is consistent with the database. Adding a calendar picker will make your application look and feel more professional. Learn more.
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Call External Object Programs:
m-Power can handle your back-end business code too! The use of External Objects allows m-Power to tie into your custom coding easily, whether it is Java, SQL, or RPG. Learn more.
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Saved Searches:
For end users running applications, there is a feature that allows them to save the search and come back to it later, saving them time and making it more efficient by saving multiple searches and switching between them with just a click. These searches can be found on the right upper corner of the running application by clicking Options then Saved Searches. Learn more.
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Customize HTML with m-Painter:
m-Power ships with its own HTML editor. This tool, called m-Painter, allows you to modify the HTML code in a very easy way by using a WYSIWYG (What You See Is What You Get) editor, where all the graphical modifications are instantly visible. For the advance developers, there is a text editor mode too. You can access the HTML editor by clicking Presentation on the Application Menu. Learn more.
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Control DB Join Type:
When joining tables you can set the join type of the application to be Left Outer Join or Inner Join. An inner join specifies that only records in the primary table with matching records in the secondary table will be displayed.
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Add Row-Level Logical Fields:
m-Power allows you to create a logical field at the database level that is available to all applications. The options are Substring, Concatenation, or UDF (User Defined Function). By creating these files at the dictionary level, they are reusable across the entire dictionary, saving the developer time! Learn more.
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Tablet & Mobile Output:
m-Power allows developers to create applications specifically for PC browser, Tablet, and Smartphone devices. For the user, this means that they can access the same report on their PC, tablet, and smartphone and see a completely different output on each that has been tailor-made for their device. For the developer, it means that they can create and maintain one single application that will create the proper output formats automatically. Learn more.
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SmartLinks allow developers to easily link one application (Inquiry, Report, or Maintenance) to any other application, passing key data automatically. An example of this can be an Inquiry or a Report that links to a maintainer to update only an specific record and then redirect back to the list of records. By smartlinking applications m-Power makes it easy to link applications together to create smooth navigation between web applications. Learn more.
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Grid Update Maintenance Features

Update or Delete Multiple Database Records:
The Grid Update Maintenance template can be used to create web applications that allow end users to easily modify their data. End users modify data through various action modes including viewing an existing row, editing an existing row, and deleting an existing row. This template offers the additional functionality of displaying multiple records to the screen for ease of use.
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URL Redirection:
m-Power developers have the ability to specify a URL to redirect to after an action such as adding a new record, updating an existing record, or deleting an existing record is performed. For instance, maintainers are often linked to from retrievals and reports in order to update a single database row. After updating the row, a URL redirect can be used to return to the original data list. The URL redirection can be conveniently specified within the application properties. More Information.
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Audit for User, Time, and Date:
When you utilize maintenance applications for your end users, you will, more likely than not, want to record when and who have made changes to data. The Grid Update Maintenance template allows developers to easily audit for user, time, and/or date, providing additional security and information over your data. More Information
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Modify Primary Tables Only:
m-Power developers can specify whether each maintenance application can be used to edit only primary tables or to edit primary and secondary tables. By default, maintenance applications will only allow modification of the primary table whenever a table join is made. This setting can be altered via application properties, and prevents unwanted modification of secondary tables.
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Display, Hide, or Update Individual Fields:
Occasionally you will need to include a field within your maintainer but do not necessarily want that field to be altered. For instance, perhaps you are including a numeric field that will be used in a calculation, but do not want that field to be changed. m-Power allows each field within the application to be set to either display, hide, or update, allowing the use of fields within the application but not requiring all fields to be editable.
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Use Alternative Input Methods:
m-Power maintenance templates can utilize radio buttons, check boxes, calendar pickers, and external drop-down lists to populate input values. These can easily be created via field settings within the m-Power interface and m-Painter to improve application functionality and appearance.
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Alternative Default Sort Fields:
Grid Update Maintainers display lists of records using Sequence Key information to sort and uniquely identify records during update and delete actions. Often times, developers want to sort their record lists by fields that are not unique keys. To do this navigate to the application's properties page and find the Default Sort Fields function. From here enter the field names to sort by or click the blue help icon to open a Field Helper. The Field Helper will display all possible sort fields within an application. The user can also choose multiple sort fields, and whether the fields will appear in ascending or descending order.

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Template Notes

Application Settings

Description: Allow developers to specify their application's description.

Program Name: This will be the application’s name, by default m-Power uses the letter M (Maintenance) followed by a five digit number.

Template: You can select a template by scrolling left or right through the available templates. The templates define the general layout and functionality of the resulting application. This section will list all the available maintenance templates; you will see a small screenshot of what that template looks like at runtime. Learn more about templates.

Compile: Developers can designate whether an advanced search row (within the table header) or advanced search dialog (within a popup window) is used for filtering and searching. More Information

Data Selection

Here you will see/modify the table you have selected for your application. Here you can create or modify joins to other tables as well. When tables are selected, only the primary table can be modified, by default. This is done to protect developers from accidental cascading changes. This behavior can be modified within the application properties.


When building maintenance applications, a developer’s sequencing selection is analogous with selecting a Primary Key. This selection will tell m-Power how this table is unique. If the sequencing key(s) are not unique, then multiple records will be affected when a record is modified or deleted. Any fields that are set as sequencing fields within a maintenance application will not be editable.

Field Settings

Here you will find the settings for all the fields in the application. The options are:

Delete: You can delete fields by clicking the checkbox and clicking Accept. If a field has a red circle with a cross line, that means that the field is being used somewhere else in the application (sequence, calculation, etc.), and, due to this dependency, is not available for deletion. NOTE: deleting a field will remove the field from the application only, the table will be unchanged.

Field Name: This is the same name the field has in the table.

Table: The name of the table where that field exists.

Field Description: This is the text that will appear in the column header for that field, you can modify this field to suit your needs. This field will populate with the field description from the table by default, but it can be customized at the application level.

Type: A drop down list that allows developers to designate whether a field is to be displayed (visible, but not edited on the database), hidden (no action), or updated. There may be situations where a field is needed for calculation purposes, but the field does not need to be displayed at runtime. Note: sequence keys must be set to update to ensure your application functions properly.

Size: This displays the length of a field. If a field has a length consisting of two numbers separated by a comma, the first number will be the integer length and the second the decimal length of the field.

Lowercase: This option determines whether or not an alpha field can be submitted to the database with lowercase letters. If this is set to "no," the field will be converted to uppercase when it is submitted.

Numeric Format Code: For numeric fields, you can modify the way the numbers will display, this includes displaying commas or not, how to display negative numbers, etc. Multiple formats are built in for developers to use, shall you need a different format code, m-Power allows developers to create their own User Defined Format codes; these codes will add logic for common types of fields such as: Currency, Time, or Dates. Accessing the User Defined Format Codes from the Admin section will also allow developers to modify current codes. Learn more.

User def: If you would like a user to be able to upload a file over a field, select the letter 'U' from the dropdown. The remaining options have been deprecated.
Note: Do not confuse the User Defined Format Code with the User Defined Functions (UDF). The latter is a feature that allows developers to create or incorporate programing functions into m-Power. Learn more about UDFs.

Validity Check Relation: This setting, combined with the Validity Check Value setting will allow you to restrict what information may be entered into your maintenance application. Valid relationships are:

EQ Equal to
GE Greater than or equal to
GT Greater than
LE Less than or equal to
LS Is in the list
NS Not in the list
LT Less than
NE Not equal to
NG Not greater than
NL Not less than
RG Is in the range
RB Radio Button
CB Checkbox

Validity Check Value: This is the value that you want to compare the field value entered to in order to restrict the user from proceeding. A common use of this and the previous setting is to prevent the user from leaving a character field blank. This is done by setting the Validity Check Relation to "NE" and setting the Validity Check Value to be "*BLANK". This will prevent the user from entering a blank value into the field.

Default Value for Add: Text entered here will be entered into the field initially when a new record is being added. Users may change it to whatever they wish, however this is what they see first. A common use of this setting is to add "Insert Full Name Here" into a name field.

Record Selections

Record Selections can be created over any database fields. These are the options:

Field: A drop down allows you to select the field you want to filter on.

Relation: A drop down allows you to select a relationship for the filter.

Value: This is the value to compare against. The options are:

Constant Value: A constant value allows you to hard-code any given value into a selection. This value cannot be modified by the end-user at run–time.

Application Field Value: Developers have the option of comparing a value from one field to a value from another field within the same record.

And/Or: When creating multiple record selections, you have the option to set them as "and" or "or" Example: selection A "and" selection B will display only records that match both selections. Selection A "or" selection B will display records that match one or both selections. Learn more.


Calculations are a very powerful feature of m-Power; with calculations, developers can create logical fields that will apply to the current application only. This can be used to include SQL code in a field, such as cast a numeric field as character, create date conversions, inserting the current date and time, and much more. Note: like all other application types, the result of a calculation is always read only. In other words, calculations are not written to the database in maintenance applications. Learn more

External Objects

This feature allows developers to connect m-Power application with their current business logic, or to extend m-Power capabilities by allowing developers to write their own Java, RPG, or SQL programs, and integrating these programs into the applications. m-Power utilizes "locations" to connect the external objects, these locations vary depending on what the external object does and when it should be executed. The following locations are supported in this template:

*AFTERACT This location calls the object after a user either Updates or Deletes a row.
*AFTERDLT This location calls the object only after a user Deletes a row.
*AFTERUPD This location calls the object only after a user Updates a row.
*BEFOREACT This location calls the object before a user either Updates or Deletes a row.
*BEFOREDLT This location calls the object only before a user Deletes a row.
*BEFOREUPD This location calls the object only before a user Updates a row.
*CALCOBJ This location calls the object for every row, after performing calculations.
*READRECRD This location calls the object for every row, before performing calculations.
*INITACT This location calls the object when the page loads, no matter the action mode.
*INITDLT This location calls the object on page load, only when the user is in Delete mode.
*INITUPD This location calls the object on page load, only when the user is in Update mode.
*REDIRECT This location is deprecated in this template.
*AFTADDRE This location is deprecated in this template.
*AFTDLTRE This location is deprecated in this template.
*AFTUPDRE This location is deprecated in this template.
*FLDVALID This location calls the object to validate fields before every action.
Learn more


SmartLinks allow developers to easily link one application (Retrieval, Report, or Maintenance) to any other application, passing key data automatically. The benefit of SmartLinks is that it allows users the ability to quickly "drilldown" into other applications based on the selected row. By passing parameters automatically when creating a link in m-Painter, SmartLinks save the developer time by simplifying the process. Learn more

Note: After performing any changes in the above sections, the application must be recompiled for the changes to load. If the changes are to be displayed at runtime, then the Presentation Layer code (HTML) must be overwritten when recompiling the application.

Runtime Walkthrough

Grid Update Maintainers allow end-users to rapidly edit or delete records that already exist on the database. When the application loads, the grid is automatically populated with data. We can search or sort for the records we wish to edit, as well as page through the application.

Once we have located the correct records, we can edit the data directly on the grid. Alternatively, we can specify that a record is to be deleted by checking the appropriate box. Once we have finished making any changes, we need to click 'Accept' for these changes to be saved on the database.

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Template In-Action

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Application Properties

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Web Parameters

Common Parameters — These parameters apply to every template:

Name Valid Values Example Value Default Value Description
  • 0: Off
  • 1: On
1 0 This parameter allows the app to only display the main content area.
  • Any URL-encoded value
5000 When a calculation is a parameter calc, you can pass its value across the URL to other mrc applications. Use CALCULA001 for your first calculation, CALCULA002 for your second calculation, and so on, for all your parameter calculations.
Custom Parameters
  • Any URL-encoded value
33 Freemarker custom parameters can be passed through the URL.
  • 0: Off
  • 1: On
1 0 This parameter allows the app to only display the main data table.
  • 0: Off
  • 1: On
  • 2: On & Show Import URLs
1 0 Loads your application with SQL statement and application logic time listed. This is often useful in determining how your dataset was determined and deciding if indexes should be created for this query.
  • pc: Computer
  • tab: Tablet
  • mob: Smartphone
tab pc This parameter sets the current device type mode for the entire session. While device is automatically seen and set, you can use this to manually change it to a different device type.
  • Any URL-encoded value
23 Applications allow you to pass values directly to any field when it is specified as a sequence key.
  • 0: Off
  • 1: On
1 0 This parameter controls whether the parameter listing screen should be displayed for this application or not.
  • 0: Show header/footer
  • 1: Hide header/footer
1 0 This parameter controls whether the header and footer are hidden.
  • Any positive integer
1 0 This parameter allows the app to only display the HTML inside the associated custom import.
  • 0: Off
  • 1: On
1 0 Forces your application to refresh the page from the server. Useful if you are making changes in a development environment but are not seeing your changes.
  • ar: Arabic
  • bg: Bulgarian
  • ca: Catalan
  • zh: Chinese
  • cs: Czech
  • da: Danish
  • nl: Dutch
  • en: English
  • et: Estonian
  • fi: Finnish
  • fr: French
  • de: German
  • el: Greek
  • he: Haitian Creole
  • hi: Hindi
  • ht: Hebrew
  • hu: Hungarian
  • id: Indonesian
  • it: Italian
  • ja: Japanese
  • ko: Korean
  • lv: Latvian
  • lt: Lithuanian
  • no: Norwegian
  • pl: Polish
  • pt: Portuguese
  • ro: Romanian
  • ru: Russian
  • sk: Slovak
  • sl: Slovene
  • es: Spanish
  • sv: Swedish
  • th: Thai
  • tr: Turkish
  • uk: Ukrainian
  • vi: Vietnamese
es en This lets you choose which language layer to view for the entire session. Only available when using the m-Power Translate feature.


Web 2.0 Grid Update Maintenance Specific Parameters:

Name Valid Values Example Value Default Value Description
  • Any valid URL
MRCWORKLIB.I00010s This parameter controls where to redirect after adding, updating or deleting a row. Use ${FIELD} to reference value from FIELD.
  • Any field within the application
CUSNO m-Power uses this option to sort the data by at runtime.
  • Any valid URL
MRCWORKLIB.I00010s This parameter controls where to redirect after deleting a row. Use ${FIELD} to reference value from FIELD.
  • Any positive integer
15 10 This parameter controls how many rows will be displayed when the page is displayed.
  • Any valid file in your data dictionary
I00010sAlt.html The default presentation file This parameter allows you to have multiple screens per application. Often useful when you need to paint outputs differently, yet still use the same application.
  • Y: Yes
  • N: No
Y N m-Power uses this option to inform the server to resort the data.
  • EQ: Equal to
  • NE: Not equal to
  • GE: Greater than or equal to
  • GT: Greater than
  • LE: Less than or equal to
  • LT: Less than
  • LS: in the list
  • NS: not in the list
  • RG: In the range
  • NR: Not in the range
  • NG: Not greater than
  • NL: Not less than
  • CT: Contains
  • CA: Contains all
  • CO: Contains any
  • SW: Starts with
EQ This allows you to set the relationship for FIELD's filtering, and is used in conjunction with val_FIELD. For instance, rls_CNAME=CT would set column CNAME's search relationship to Contains.
  • 0: Off
  • 1: On
1 0 This parameter tells your retrieval that this page is a SmartLink. This means that the page will only show records that equal the value(s) you pass to it. Without specifying slnk=1, the page assumes a greater than or equal to (GE) relationship.
  • 0: Descending
  • 1: Ascending
0 1 m-Power uses this option to know whether to sort by ascending or descending order.
  • Any valid URL
MRCWORKLIB.I00010s This parameter controls where to redirect after updating a row. Use ${FIELD} to reference value from FIELD.
  • Any URL-encoded value
23 Used in conjunction with rls_FIELD, this is used to filter apps through the URL. For instance, specifying val_CNAME=ABC means that your page will use ABC as the value to search for in column CNAME.

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Created: September 18, 2013 | Modified: June 12, 2017