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Why is my AutoComplete suggestion dropdown blank

I have a Xamarin form where I am trying to add a SyncFusion AutoComplete control. The data is a simple class with only three string fields (CUSTNMBR, CUSTNAME, ZIP). I want it to match on any of the fields and display the coresponding CUSTNMBR. Here it my line in Xaml:
<xForms:SfAutoComplete x:Name="customerAutoComplete" WidthRequest="120" BackgroundColor="White" />
In the form's code-behind constructor I call LoadCustomerData():
private async void LoadCustomerData()
{
customerAutoComplete.DataSource = await GetCustomerCodes();
customerAutoComplete.DisplayMemberPath = "CUSTNMBR";
customerAutoComplete.SelectedValuePath = "CUSTNMBR";
customerAutoComplete.SuggestionMode = SuggestionMode.Custom;
customerAutoComplete.Filter = FilterCustomers;
customerAutoComplete.AutoCompleteMode = AutoCompleteMode.Suggest;
customerAutoComplete.Watermark = "Zip Code, Customer ID, or Customer Name";
customerAutoComplete.MinimumPrefixCharacters = 3;
}
Here is my filter method.
private bool FilterCustomers(string search, object customer)
{
var text = customerAutoComplete.Text;
if (customer != null)
{
var myCustomer = (OrganizationSearchDto)customer;
if (myCustomer.CustName.Contains(text) || myCustomer.CustNmbr.Contains(text) ||
myCustomer.Zip.Contains(text))
{
return true;
}
}
return false;
}
The above code worked partially when I had customerAutoComplete.SuggestionMode = SuggestionMode.Contains but it did not match on the other two fields. Now it still runs, however nothing is shown in the dropdown list (its blank). Why is my dropdown blank? Any hints, suggestion or a hard shove in the right direction will be appreciated.

For anyone encountering this, tests to try:
Put a breakpoint on return true - is that breakpoint hit for the customer(s) you expect to be shown as suggestions?
Swap return true and return false, so it is true for all the OTHER customers - the opposite of what you want. See if it is still blank. If it is, then it isn't the filter - code elsewhere is interfering with display. Would need to show more code, or make a github containing a minimum repo that shows the problem.
[from OP] The issue was that property names on DisplayMemberPath are case sensitive, as are the filter checks.
The fix for the filter was to ignore case everywhere. E.g.
if (myCustomer.CustName.ToLower().Contains(text.ToLower()) || ...)

We have analyzed the reported query. We have achieved the requirement by using the following code snippet,
public bool ContainingSpaceFilter(string search, object item)
{
if (item != null)
{
var myCustomer = item as Employee;
if (**myCustomer.Name.ToUpper().Contains(search.ToUpper()**) || myCustomer.ID.Contains(search) ||
myCustomer.ZipCode.Contains(search))
{
return true;
}
}
return false;
}

In relation to acumatica, is there a way to grab a variable from one table and use it as part of an id for another table?

The 'Customer' form has a variable called AcctReferenceNbr (Variable that I'm trying to grab shown in yellow) which takes a two-letter abbreviation of the customer name. I am currently editing the Projects form, and I want to use this abbreviation as part of the External Ref. Nbr.
The attached image End Result I'm trying to achieve shows what the end result should look like. The number from the QuoteID is appended to the abbreviation.
I am able to successfully grab the QuoteID as it is part of the Projects table, but I am currently unable to grab the AcctReference Nbr from the Customer table.
I have a RowSelected event on the QuoteID field, which is shown below:
namespace PX.Objects.PM
{
public class ProjectEntry_Extension : PXGraphExtension<ProjectEntry>
{
#region Event Handlers
protected void PMProject_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
{
PMProject row = (PMProject)e.Row;
if (row.ContractCD != null) {
PMProject item = PXSelectorAttribute.Select<PMProject.contractCD>(cache, row) as PMProject;
// The "UP" string is where the abbreviation is supposed to be,
// but I just added two letters to test if the appending works, which it does.
row.ExtRefNbr = "UP" + item.ContractCD;
}
}
#endregion
}
}
What I've tried so far:
Accessing the Customer table namespace to grab the value and pass it to the Projects form, which didn't work because it didn't accept the Customer type in the Projects form.
Adding a PXDefault attribute to the External Ref. Nbr which would try and grab the variable using SQL.
I'm a bit stuck on what else I can try. Any help would be appreciated :)
UPDATED
Below is how I went about trying to grab the AcctReferenceNbr value from the Customer table.
The reason why I tried using the PXSelectorAttribute method was that I added the AcctReferenceNbr as a column to the Quote ID selector (selector is shown in the link above called 'End Result I'm trying to achieve').
So I figured I could try and grab that value in the Customer namespace, as that is where the variable resides, and pass that up to the Project namespace above.
Then, I would call the public method below in the Project namespace to get the required abbreviation:
// instead of this
row.ExtRefNbr = "UP" + item.ContractCD;
// it would be this
row.ExtRefNbr = PX.Objects.AR.CustomerMaint_Extension.getAcctReferenceNbr(cache, e) + item.ContractCD;
namespace PX.Objects.AR
{
public class CustomerMaint_Extension : PXGraphExtension<CustomerMaint>
{
#region Event Handlers
public static string getAcctReferenceNbr(PXCache cache, PXRowSelectedEventArgs e)
{
BAccount row = (BAccount)e.Row;
BAccount item = PXSelectorAttribute.Select<BAccount.acctReferenceNbr>(cache, row) as BAccount;
return item.acctReferenceNbr;
}
}
#endregion
}
}
Is there a proper way to target the actual table?

try this. I haven't tested this but give it a go.
protected void PMProject_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
{
PMProject row = (PMProject)e.Row;
if (row.ContractCD != null && row.CustomerID != null)
{
BAccount ba = (BAccount )PXSelectorAttribute.Select<PMProject.customerID>(cache, row) ;
row.ExtRefNbr = ba.AcctReferenceNbr+ row.ContractCD;
}
}
you certainly don't need to extend the CustomerMaint graph.

Change Textbox text from another frame(container)

I see here lot of similar question, but I still not find answer that help me in situation.
I have two frame(lets say FrameChild), one is "in" another(practically FrameChild is in this frame, lets say FrameMain).
When I insert all parameters in FrameChild and tap on button witch is on bottom of FrameMain I call method that return string...
Now when i get string i need to change textbox text in FrameChild
I have tray many way.
First idea was something like:
FrameChild frm = new FrameChild;
frm.textbox.text = "somestring";
But nothing happen.
Than i thing use some property.
in FrameChield:
public string setTicNo
{
set
{
textBox.Text = value;
}
}
in FrameMain:
FrameChild frm = new FrameChild;
frm.setTicNo = "somestring";
When i debbuging I get value, but textbox still is empty...
On the end I try to bind textbox text on setTicNo;
public string setTicNo
{
get
{
return setTicNo;
}
set
{
setTicNo = value;
}
}
Xaml:
Text = {Binding setTicNo, Mode=TwoWay,UpdateSourceTrigger=Explicit}
(here i try use more bindings, but every time i get infinite loop.
Please help , I not have more ideas..
Thanx

Did you try building a single view model and bind it to both frames, if it was passed by ref which is the default it will change the value once you do.
A side note implement a INOTIFYPROPERTYCGANGED in the View model

Searching ListBox control and programmatically selecting closest match

I have a ListBox control populated with branches of a large retail chain. The staff using the system have to log in to the relevant branch, and I would like them to be able to search the ListBox to find their branch.
I have created an event handler for when text in the search box changes, and attempted to use code sound on StackOverflow already:
private int lastMatch = 0;
private void txtSearch_TextChanged(object sender, EventArgs e)
{
int x = 0;
string match = txtSearch.Text;
if (txtSearch.Text.Length != 0)
{
bool found = true;
while (found)
{
if (lbBranches.Items.Count == x)
{
lbBranches.SetSelected(lastMatch, true);
found = false;
}
else
{
lbBranches.SetSelected(x, true);
match = lbBranches.SelectedValue.ToString();
if (match.Contains(txtSearch.Text))
{
lastMatch = x;
found = false;
}
x++;
}
}
}
}
When I compile and start typing into the search box, I get this error:
Object reference not set to an instance of an object.
The line in question is:
match = lbBranches.SelectedValue.ToString();
I have no idea what could be wrong there, anyone got an idea?
Thanks!

SelectedValue of the listbox will only return a value if you have specified the ValueMember property of the listbox to indicate a property from which you would like to read the value for the selected item. The property you want to use in this case is SelectedItem:
match = lbBranches.SelectedItem.ToString();

when the user is entering text it's possible that no value has been selected (hence the error) -- keep in mind that what is being entered by the user has no mandatory or direct association with selections in the controls listbox sub-element
it's possible what you're doing might be simpler to implement with a full combo-box control and I think some of the examples at MSDN could be very helpful for you as well

Design time error in form for object with

I have an control that inherits from another control (TxTextControl). I have a SelectedText property that basicaly wraps the base SelectedText property, which is apparently needed because my control is implementing an interface with that property. The code is this:
public string SelectedText
{
get
{
return base.Selection.Text; // Error here (#1042)
}
set
{
if (base.Selection == null)
{
base.Selection = new TXTextControl.Selection(0, 0);
}
base.Selection.Text = value;
}
}
When I drop this control on a form, no problems. It compiles and runs. Everything looks great. However, when I save, close then reopen the form, the form designer shows this error:
Object reference not set to an instance of an object.
1. Hide Call Stack
at Test.FormattedTextBox2.get_SelectedText() in C:\Projects\Test\FormattedTextBox2.cs:line 1042
Anyone know what is going on? I'm about to pull out my last hair...
UPDATE:
darkassisin93's answer wasn't exactly correct, but that was because my posted code wasn't exactly accurate. I needed to test if base.Selection was null before attempting to access a property of that object. In any case, that answer got me headed in the right direction. Here is the actual solution:
public string SelectedText
{
get
{
string selected = string.Empty;
if (base.Selection != null)
{
selected = base.Selection.Text;
}
return selected;
}
set
{
if (base.Selection == null)
{
base.Selection = new TXTextControl.Selection(0, 0);
// Have to check here again..this apparently still
// results in a null in some cases.
if (base.Selection == null) return;
}
base.Selection.Text = value;
}
}

Try replacing
return base.SelectedText;
with
return base.SelectedText ?? string.Empty;
It's most likely because the base class's SelectedText property is set to null.