CreateUiDefinition string functions

These functions to use with JSON strings.

Concatenates one or more strings.

For example, if the output value of element1 if "Contoso", then this example returns the string "Demo Contoso app":

"[concat('Demo ', steps('step1').element1, ' app')]"

Determines whether a string ends with a value.

The following sample returns true.

"[endsWith('tuvwxyz', 'xyz')]"

Generates a globally unique string (GUID).

The following example returns a value like "c7bc8bdc-7252-4a82-ba53-7c468679a511":

"[guid()]"

Returns the first position of a value within a string or -1 if not found.

The following sample returns 2.

"[indexOf('abcdef', 'cd')]"

Returns the last position of a value in a string or -1 if not found.

The following sample returns 3.

"[lastIndexOf('test', 't')]"

Returns a string in which all occurrences of the specified string in the current string are replaced with another string.

The following example returns "Contoso.com web app":

"[replace('Contoso.net web app', '.net', '.com')]"

Determines whether a string starts with a value.

The following sample returns true.

"[startsWith('abcdefg', 'ab')]"

Returns the substring of the specified string. The substring begins at the specified index and has the specified length.

The following example returns "web":

"[substring('Contoso.com web app', 12, 3)]"

Returns a string converted to lowercase.

The following example returns "contoso":

"[toLower('CONTOSO')]"

Returns a string converted to uppercase.

The following example returns "CONTOSO":

"[toUpper('contoso')]"

• For an introduction to Azure Resource Manager, see Azure Resource Manager overview.