I have a project that I am working on which involves the need to set the ListView filter fields.

Back when I was much younger and far more naïve 🙂 I would brute force my want to locate the control (https://potatoit.kiwi/2010/10/10/manipulating-smart-office-column-header-filter-values/). Years later I saw the light and stumbled across the fields but I didn’t ever get around to posting about it. Of course, I couldn’t remember where I had found the fields nor could I find a posting about it on my blog so I did some investigation.

I also wrote some code around exploring what I thought was the appropriate field list and expanded that as it became more apparent that I was on the right track, until finally I wrote some functions to test that I would actually use.

As you can guess by the title, PositionFields are where the ListView filter TextBoxes are stored and as one would expect, they are stored in a list on the ListControl.

Below is a script which demonstrates retrieving and setting the filter TextBox values.

/*
**	Name:	test_SetListViewFields.js
**	Panel:	/B
**
**	Description:
**		this will demonstrate retrieving the values of the filter/position fields
**		for the ListView, it also has some clean functions to do the retrieval/setting
**
**
**	Written by:
**		Scott Campbell (scott.campbell@potatoit.kiwi)
**
**	History:
**	20170218	SAC		* started
**
*/

import System;
import System.Windows;
import System.Windows.Controls;
import MForms;

import Mango.UI;

package MForms.JScript
{
	class test_SetListViewFields
	{
		var gDebug = null;
		var gController = null;
		var gContent = null;
		
		var gListControl = null;
		var gListView = null;
		
		public function Init(element: Object, args: Object, controller : Object, debug : Object)
		{
			gDebug = debug;
			gController = controller;
			gContent = controller.RenderEngine.Content;
			
			gDebug.Debug("test_SetListViewFields Init()");
			
			gListView = gController.RenderEngine.ListViewControl;
			gListControl = gController.RenderEngine.ListControl;
			
			var positionFieldName = "";
			
			if(null != gListControl && null != gListControl.PositionFields)
			{
				gDebug.Debug("Position Field Count: " + gListControl.PositionFields.Count);
				for(var i = 0; i < gListControl.PositionFields.Count; i++)
				{
					var currentPositionField = gListControl.PositionFields[i];
					if(null != currentPositionField)
					{
						gDebug.Debug("  +-- PositionField[" + i + "] Type: " + currentPositionField.GetType());
						
						if(currentPositionField.GetType().ToString() == "System.Windows.Controls.TextBox")
						{
							positionFieldName = currentPositionField.Name;
							gDebug.Debug("  +-- PositionField[" + i + "] is a TextBox, it's name is: " + currentPositionField.Name);
							gDebug.Debug("  +-- PositionField[" + i + "] is a TextBox, it's value is: " + currentPositionField.Text);
							
							gDebug.Debug("  +-- PositionField[" + i + "] testing the retrieving of the value: '" + getPositionTextBoxValue(gListControl, positionFieldName) + "'");
						
							gDebug.Debug("  +-- PositionField[" + i + "] is a TextBox, we will now set its value to " + i);
							setPositionTextBoxValue(gListControl, positionFieldName, i.ToString());
						}
					}
				}
			}
		}
		
		private function setPositionTextBoxValue(aListControl : ListControl, aFieldName : String, aValue : String)
		{
			var textBox : TextBox = getPositionTextBox(aListControl, aFieldName);
			if(null != textBox)
			{
				textBox.Text = aValue;
			}
		}

		private function getPositionTextBoxValue(aListControl : ListControl, aFieldName : String)
		{
			var result = "";
			var textBox : TextBox = getPositionTextBox(aListControl, aFieldName);
			if(null != textBox)
			{
				result = textBox.Text;
			}
			return(result);
		}

		
		private function getPositionTextBox(aListControl : ListControl, aFieldName : String)
		{
			var result : TextBox = null;
			if(null != aListControl && false == String.IsNullOrEmpty(aFieldName))
			{
				if(null != aListControl.PositionFields && aListControl.PositionFields.Count > 0)
				{
					for(var i = 0; i < aListControl.PositionFields.Count; i++)
					{
						var positionField = aListControl.PositionFields[i];
						if(null != positionField && positionField.GetType().ToString() == "System.Windows.Controls.TextBox" && positionField.Name == aFieldName)
						{
							result = positionField;
							break;
						}
					}
				}
			}
			return(result);
		}
	}
}

And this is the output from the script