WddxRecordset object

Last updated on May 30, 2024 | Also applies to ColdFusion

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11. WDDX JavaScript Objects
Cloud services

Includes functions that you call as needed when constructing a WDDX record set. For more information on using this object, see Using WDDX in the Developing ColdFusion Applications.

Functions

Function syntax	Description
object.addColumn(name)	Adds a column to all rows in a WddxRecordset instance.
object.addRows(n)	Adds rows to all columns in a WddxRecordset instance.
object.dump(escapeStrings)	Displays WddxRecordset object data.
object.getField(row,col)	Returns the element in a row/column position.
object.getRowCount()	Indicates the number of rows in a WddxRecordset instance.
object.setField(row, col, value)	Sets the element in a row/column position.
object.wddxSerialize(serializer)	Serializes a record set.

Returns

HTML table of the WddxRecordset object data.

Usage

Convenient for debugging and testing record sets. The boolean parameterescapeStringsdetermines whether<>&characters in string values are escaped as<>&in HTML.

Example

SELECT Message_Id, Thread_id, Username, Posted

FROM messages

</cfquery>

// Use WDDX to move from CFML data to JS

// Dump the record set

document.write(qj.dump(true));

</script>

<cfquery name = "q" datasource ="cfdocexamples"> SELECT Message_Id, Thread_id, Username, Posted FROM messages </cfquery>  <script type="text/javascript" src="/CFIDE/scripts/wddx.js"></script> <script> // Use WDDX to move from CFML data to JS <cfwddx action="cfml2js" input="#q#" topLevelVariable="qj"> // Dump the record set document.write(qj.dump(true)); </script>

<!--- Create a simple query ---> 
<cfquery name = "q" datasource ="cfdocexamples"> 
SELECT Message_Id, Thread_id, Username, Posted 
FROM messages 
</cfquery> 
<!--- Load the wddx.js file, which includes the dump function ---> 
<script type="text/javascript" src="/CFIDE/scripts/wddx.js"></script> 
<script> 
// Use WDDX to move from CFML data to JS 
<cfwddx action="cfml2js" input="#q#" topLevelVariable="qj"> 
// Dump the record set 
document.write(qj.dump(true)); 
</script>

addColumn

Description

Adds a column to all rows in a WddxRecordset instance.

Syntax

object.addColumn( name )

Parameters

Parameter	Description
object	Instance name of the WddxRecordset object
name	Name of the column to add

Return value

None.

Usage

Adds a column to every row of the WDDX record set. Initially the new column’s values are set to NULL.

Example

This example calls theaddColumnfunction:

// Create a new record set

rs = new WddxRecordset();

// Add a new column

rs.addColumn("NewColumn");

// Extend the record set by 3 rows

rs.addRows(3);

// Set an element in the first row

// newValue is a previously defined variable

rs.setField(0, "NewColumn", newValue);

// Create a new record set rs = new WddxRecordset(); // Add a new column rs.addColumn("NewColumn"); // Extend the record set by 3 rows rs.addRows(3); // Set an element in the first row // newValue is a previously defined variable rs.setField(0, "NewColumn", newValue);

// Create a new record set 
rs = new WddxRecordset(); 

// Add a new column 
rs.addColumn("NewColumn"); 

// Extend the record set by 3 rows 
rs.addRows(3); 

// Set an element in the first row 
// newValue is a previously defined variable 
rs.setField(0, "NewColumn", newValue);

addRows

Description

Adds rows to all columns in a WddxRecordset instance.

Syntax

object.addRows( n )

Parameters

Parameter	Description
object	Instance name of the WddxRecordset object
n	Integer; number of rows to add

Return value

None.

Usage

This function adds the specified number of rows to every column of a WDDX record set. Initially, the row/column values are set to NULL.

Example

This example calls theaddRowsfunction:

// Create a new record set

rs = new WddxRecordset();

// Add a new column

rs.addColumn("NewColumn");

// Extend the record set by 3 rows

rs.addRows(3);

// Set an element in the first row

// newValue is a previously defined variable

rs.setField(0, "NewColumn", newValue);

// Create a new record set 
rs = new WddxRecordset(); 

// Add a new column 
rs.addColumn("NewColumn"); 

// Extend the record set by 3 rows 
rs.addRows(3); 

// Set an element in the first row 
// newValue is a previously defined variable 
rs.setField(0, "NewColumn", newValue);

getField

Description

Returns the element in the specified row/column position.

Syntax

object.getField( row, col )

Parameters

Parameter	Description
object	Instance name of the WddxRecordset object
row	Integer; zero-based row number of the value to return
col	Integer or string; column of the value to be returned.

Return value

Returns the value in the specified row/column position.

Usage

Call this function to access a value in a WDDX record set.

Example

This example calls thegetFieldfunction (the variable r is a reference to a WddxRecordset instance):

for (row = 0; row < nRows; ++row)

{

o += "<tr>";

for (i = 0; i < colNames.length; ++i)

{

o += "<td>" + r.getField(row, colNames[i]) + "</td>";

}

o += "</tr>";

}

for (row = 0; row < nRows; ++row) { o += "<tr>"; for (i = 0; i < colNames.length; ++i) { o += "<td>" + r.getField(row, colNames[i]) + "</td>"; } o += "</tr>"; }

for (row = 0; row < nRows; ++row) 
{ 
o += "<tr>"; 
for (i = 0; i < colNames.length; ++i) 
{ 
o += "<td>" + r.getField(row, colNames[i]) + "</td>"; 
} 
o += "</tr>"; 
}

getRowCount

Description

Indicates the number of rows in a WddxRecordset instance.

Syntax

object.getRowCount( )

Parameters

Parameter	Description
object	Instance name of a WddxRecordset object

Return value

Integer. Returns the number of rows in the WddxRecordset instance.

Usage

Call this function before a looping construct to determine the number of rows in a record set.

Example

This example calls thegetRowCountfunction:

function dumpWddxRecordset(r)

{

// Get row count

nRows = r.getRowCount();

...

for (row = 0; row < nRows; ++row)

...

function dumpWddxRecordset(r) { // Get row count nRows = r.getRowCount(); ... for (row = 0; row < nRows; ++row) ...

function dumpWddxRecordset(r) 
{ 
// Get row count 
nRows = r.getRowCount(); 
... 
for (row = 0; row < nRows; ++row) 
...

setField

Description

Sets the element in the specified row/column position.

Syntax

object.setField( row, col, value )

Parameters

Parameter	Description
object	Instance name of a WddxRecordset object
row	Integer; row that contains the element to set
col	Integer or string; the column containing the element to set
value	Value to set

Return value

None.

Usage

Call this function to set a value in a WddxRecordset instance.

Example

This example calls thesetFieldfunction:

// Create a new recordset

rs = new WddxRecordset();

// Add a new column

rs.addColumn("NewColumn");

// Extend the record set by 3 rows

rs.addRows(3);

// Set an element in the first row

// newValue is a previously defined variable

rs.setField(0, "NewColumn", newValue);

// Create a new recordset rs = new WddxRecordset(); // Add a new column rs.addColumn("NewColumn"); // Extend the record set by 3 rows rs.addRows(3); // Set an element in the first row // newValue is a previously defined variable rs.setField(0, "NewColumn", newValue);

// Create a new recordset 
rs = new WddxRecordset(); 

// Add a new column 
rs.addColumn("NewColumn"); 

// Extend the record set by 3 rows 
rs.addRows(3); 

// Set an element in the first row 
// newValue is a previously defined variable 
rs.setField(0, "NewColumn", newValue);

wddxSerialize

Description

Serializes a record set.

Syntax

object.wddxSerialize( serializer )

Parameters

Parameter	Description
object	Instance name of the WddxRecordset object
serializer	WddxSerializer instance

Return value

Returns a Boolean True if serialization was successful; False, otherwise.

Usage

This is an internal function; you do not typically call it.

Example

This example is from the WddxSerializerserializeValuefunction:

...

else if (typeof(obj) == "object")

{

if (obj == null)

{

// Null values become empty strings

this.write("<string></string>");

}

else if (typeof(obj.wddxSerialize) == "function")

{

// Object knows how to serialize itself

bSuccess = obj.wddxSerialize(this);

}

...

... else if (typeof(obj) == "object") { if (obj == null) { // Null values become empty strings this.write("<string></string>"); } else if (typeof(obj.wddxSerialize) == "function") { // Object knows how to serialize itself bSuccess = obj.wddxSerialize(this); } ...

... 
else if (typeof(obj) == "object") 
{ 
if (obj == null) 
{ 
// Null values become empty strings 
this.write("<string></string>"); 
} 
else if (typeof(obj.wddxSerialize) == "function") 
{ 
// Object knows how to serialize itself 
bSuccess = obj.wddxSerialize(this); 
} 
...

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WddxRecordset object

Functions

Usage

Example

addColumn

Description

Syntax

Parameters

Usage

Example

addRows

Description

Syntax

Parameters

Usage

Example

Description

Syntax

Usage

Example

Description

Syntax

Usage

Example

Description

Syntax

Usage

Example

Description

Syntax

Usage

Example

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