What is preventing Combobox SelectedValue from setting?

Question

I have several comboboxes, all similar code and only one, CustomerSelector.SelectedValue, is not working. I have even tried setting the value like this: CustomerSelector.SelectedValue=32.

This Method is for loading all the Project info to the form and is called in the form Load event. The data seems to load fine, I have even loaded 'id' to the DisplayMember to verify.

Any ideas what is preventing SelectedValue from setting?

        void loadProjectInfo()
        {
            if (isProjectInfoLoaded == false)
            {
                try
                {
                    DataTable dt4 = new DataTable();
                    DBConnector db4 = new DBConnector();
                    db4.query = "SELECT * FROM s1_pm_project WHERE id=" + JobID;
                    dt4 = db4.getDataTable();
                    DataRow PMProject = dt4.Rows[0];

                    ProjectNameTextbox.Text = PMProject["ProjectName"].ToString();
                    this.Text = ProjectNameTextbox.Text;

                    ProjectAddressTextbox.Text = PMProject["Address"].ToString();
                    ProjectAddressCity.Text = PMProject["City"].ToString();

                    ProjectAddressState.DataSource = USStates.States();
                    ProjectAddressState.ValueMember = "Abbreviations";
                    ProjectAddressState.DisplayMember = "Abbreviations";
                    ProjectAddressState.SelectedIndex = -1;
                    if (!Convert.IsDBNull(PMProject["State"]))
                        ProjectAddressState.SelectedValue = PMProject["State"].ToString();
                    ProjectAddressPostalCode.Value = (!Convert.IsDBNull(PMProject["ZipCode"])) ? Convert.ToInt32(PMProject["ZipCode"]) : 00000;

                    DBConnector db5 = new DBConnector();
                    db5.query = "SELECT id, Name FROM s1_customer ORDER BY Name ASC";
                    CustomerSelector.DisplayMember = "Name";
                    CustomerSelector.ValueMember = "id";
                    CustomerSelector.DataSource = db5.getDataTable();
                    CustomerSelector.SelectedIndex = -1;
                    //if (!Convert.IsDBNull(PMProject["CustomerID"]))
                    //    CustomerSelector.SelectedValue = Convert.ToInt32(PMProject["CustomerID"]);
                    CustomerSelector.SelectedValue=32;


                    DBConnector db1 = new DBConnector();
                    db1.query = "SELECT id, description FROM s1_app_status WHERE id < 2";
                    ProjectInfo_Status.DataSource = db1.getDataTable();
                    ProjectInfo_Status.DisplayMember = "description";
                    ProjectInfo_Status.ValueMember = "id";
                    ProjectInfo_Status.SelectedValue = Convert.ToInt32(PMProject["IsActive"]);

                    DBConnector db2 = new DBConnector();
                    db2.query = "SELECT id, description FROM s1_pm_roll";
                    ProjectInfoRollSelector.DataSource = db2.getDataTable();
                    ProjectInfoRollSelector.ValueMember = "id";
                    ProjectInfoRollSelector.DisplayMember = "description";
                    ProjectInfoRollSelector.SelectedIndex = -1;
                    if (Convert.ToInt32(PMProject["RollID"]) > 0)
                        ProjectInfoRollSelector.SelectedValue = Convert.ToInt32(PMProject["RollID"]);

                    DBConnector db3 = new DBConnector();
                    db3.query = "SELECT id, fullname FROM s1_user WHERE id>1";
                    ProjectInfoPMSelector.DataSource = db3.getDataTable();
                    ProjectInfoPMSelector.ValueMember = "id";
                    ProjectInfoPMSelector.DisplayMember = "fullname";
                    ProjectInfoPMSelector.SelectedIndex = -1;
                    if (Convert.ToInt32(PMProject["PMID"]) > 0)
                        ProjectInfoPMSelector.SelectedValue = Convert.ToInt32(PMProject["PMID"]);


                    ProjectInfoJobNoTextbox.Text = PMProject["JobNo"].ToString();
                    ProjectInfoValueTextbox.Value = Convert.ToDecimal(PMProject["ApproxValue"]);
                    if (!Convert.IsDBNull(PMProject["StartDate"]))
                        StartDateSelector.Value = Convert.ToDateTime(PMProject["StartDate"]);
                    if (!Convert.IsDBNull(PMProject["ProjectedEndDate"]))
                        ProjectedEndDateSelector.Value = Convert.ToDateTime(PMProject["ProjectedEndDate"]);
                    if (!Convert.IsDBNull(PMProject["EndDate"]))
                        EndDateSelector.Value = Convert.ToDateTime(PMProject["EndDate"]);
                    CustomerPOTextbox.Text = PMProject["CustomerPO"].ToString();
                    SalesTaxRateTextbox.Value = Convert.ToDecimal(PMProject["SalesTaxRate"]);
                    if (!Convert.IsDBNull(PMProject["WarrantyBegin"]))
                        WarrantyBegin.Value = Convert.ToDateTime(PMProject["WarrantyBegin"]);
                    if (!Convert.IsDBNull(PMProject["WarrantyEnd"]))
                        WarrantyEnd.Value = Convert.ToDateTime(PMProject["WarrantyEnd"]);
                    
                    loadContactList();

                }
                catch (Exception ex)
                {
                    Errors.Exception(ex);
                }

                isProjectInfoLoaded = true;
            }
        }

This is the output from SELECT id, Name FROM s1_customer ORDER BY Name ASC:

id	Name
22	18-8 Sherman Oaks
206	Alejo Lugo
233	Americo Builders, LLC
235	AMS Solutions, Inc
1	ARRIS Builders, Inc.
209	Chris Thrower
105	CME Refrigeration Controls
53	Coastline Provisions
117	Cortech Construction, Inc
6	Development Support Services, Inc.
146	East Bay Restaurant Supply Inc
31	Fitness Mania
7	Fulcrum Construction
32	Hardesty & Associates, Inc.
135	Howards Appliances, Inc.
9	J Ray Construction
10	J&L Metal Products
12	Jahanna L. Nichols Interior Design, Inc
69	James Barb Construction, Inc
61	JRE Construction, Inc.
13	Kamran and Company, Inc.
15	LA Deli Distributors, Inc.
98	Lovisa America, LLC
40	Mobile Customer
120	N CORONA
180	N SANTA CLARA
5	N SERVICE SALE
129	Orangecrest Properties LLC
223	Other Customer
78	Pacific Westline, Inc.

Output from SELECT * FROM s1_pm_project WHERE id=:

id	ProjectName	IsActive	CustomerID	RollID	PMID	JobNo	ApproxValue	StartDate	EndDate	ProjectedEndDate	CustomerPO	SalesTaxRate	EstimateID	WarrantyBegin	WarrantyEnd
141	Gorjana - Carlsbad	1	32	1	23	22199	37000.00	2022-02-07	2022-04-29	2022-04-29	22-012-23	0.00	NULL	2022-04-29	2023-04-29

Answer 1

The problem ended up being with the database, specifically the id field of s1_customer. For some reason it had the 'unsigned' attribute. When that was removed, everything worked as expected.