I have a small problem. I have a set of ComboBox’s that are bound to lists which are associated with a set of dictionaries that provide int values for a math equation. I need to filter the result of cb_test_2 based on the selection of cb_test_1. I think I am close. What happens when I change the value in cb_test_1 it applies the correct list as a data bind to the ComboBox however, it doubles it, placing the list in the ComboBox twice. I cant seem to find what in my code is causing this. Please have a look. I welcome any help and or criticism.
namespace Break { partial class MainForm { double x, y, z; System.Collections.Generic.List<string> cable_size0; System.Collections.Generic.List<string> cable_size1; //System.Collections.Generic.List<string> cable_size2; //System.Collections.Generic.List<string> cable_size3; //List<string> cable_size4; //List<string> cable_size5; //List<string> cable_size6; //List<string> cable_size7; //List<string> cable_size8; //List<string> cable_size9; //List<string> cable_size10; System.Collections.Generic.List<string> system_type_list; System.Collections.Generic.List<string> amperage; System.Collections.Generic.Dictionary<string, double> cable_dictionary_0; System.Collections.Generic.Dictionary<string, double> cable_dictionary_1; System.Collections.Generic.Dictionary<string, double> system_type; System.Collections.Generic.Dictionary<string, double> amperage_dictionary; private void MainFormLoad(object sender, EventArgs e) { //Each of the following lists populate the ComboBoxes //to be selected on the main form. amperage = new List<string>(); system_type_list = new List<string>(); //Filter cable_size0 = new List<string>(); cable_size1 = new List<string>(); //cable_size2 = new List<string>(); //cable_size3 = new List<string>(); //cable_size4 = new List<string>(); //cable_size5 = new List<string>(); //cable_size6 = new List<string>(); //cable_size7 = new List<string>(); //cable_size8 = new List<string>(); //cable_size9 = new List<string>(); //cable_size10 = new List<string>(); system_type = new Dictionary<string, double>(); amperage_dictionary = new Dictionary<string, double>(); //Filter cable_dictionary_0 = new Dictionary<string, double>(); cable_dictionary_1 = new Dictionary<string, double>(); //cable_dictionary_2 = new Dictionary<string, double>(); //cable_dictionary_3 = new Dictionary<string, double>(); //cable_dictionary_4 = new Dictionary<string, double>(); //cable_dictionary_5 = new Dictionary<string, double>(); //cable_dictionary_6 = new Dictionary<string, double>(); //cable_dictionary_7 = new Dictionary<string, double>(); //cable_dictionary_8 = new Dictionary<string, double>(); //cable_dictionary_9 = new Dictionary<string, double>(); //cable_dictionary_10 = new Dictionary<string, double>(); // InitializeCurrentLoadCB(); InitializeSystemTypeCB(); //Cable size filter if ((cb_test_1.SelectedIndex==0)|| (cb_test_1.SelectedIndex==1)|| (cb_test_1.SelectedIndex==2)|| (cb_test_1.SelectedIndex==3)) { InitializeCableSizeCB0(); InitializeCableLookup0(); } //InitializeCableSizeCB2(); //InitializeCableSizeCB3(); //InitializeCableSizeCB4(); //InitializeCableSizeCB5(); //InitializeCableSizeCB6(); //InitializeCableSizeCB7(); //InitializeCableSizeCB8(); //InitializeCableSizeCB9(); //InitializeCableSizeCB10(); //---------------Dictionaries--------------------------------------------------------- InitializeSystemTypeLookup(); InitializeAmperageLookup(); //Cable Size Filter //InitializeCableLookup2(); //InitializeCableLookup3(); //InitializeCableLookup4(); //InitializeCableLookup5(); //InitializeCableLookup6(); //InitializeCableLookup7(); //InitializeCableLookup8(); //InitializeCableLookup9(); //InitializeCableLookup10(); } private void Cb_test_1SelectedIndexChanged(object sender, EventArgs e) { if ((cb_test_1.SelectedIndex==0)|| (cb_test_1.SelectedIndex==1)|| (cb_test_1.SelectedIndex==2)|| (cb_test_1.SelectedIndex==3)) { InitializeCableSizeCB1(); } } private void InitializeCurrentLoadCB() { //Amperage List, No Exclusions----------------------------------------------------------- amperage.Add('Please Select Amperage'); amperage.Add('400'); amperage.Add('800'); amperage.Add('1000'); amperage.Add('1200'); amperage.Add('1600'); amperage.Add('2000'); amperage.Add('2500'); amperage.Add('3000'); amperage.Add('3200'); amperage.Add('4000'); amperage.Add('5000'); amperage.Add('6000'); cb_test_1.DataSource = amperage; cb_test_1.SelectedIndex = 0; cb_test_1.DropDownStyle = ComboBoxStyle.DropDownList; } private void InitializeCableSizeCB0() { //Cable List, No Exclusions -------------------------------------------------------------- cable_size0.Add('Please Select Cable Size'); cable_size0.Add ('#1'); cable_size0.Add ('1/0'); cable_size0.Add ('2/0'); cable_size0.Add ('3/0'); cable_size0.Add ('4/0'); cable_size0.Add ('250'); cable_size0.Add ('300'); cable_size0.Add ('400'); cable_size0.Add ('500'); cable_size0.Add ('600'); cable_size0.Add ('700'); cable_size0.Add ('750'); cb_test_2.DataSource = cable_size0; cb_test_2.SelectedIndex = 0; cb_test_2.DropDownStyle = ComboBoxStyle.DropDownList; //Initial DataBind for cable size ComboBox } private void InitializeCableSizeCB1() { //Cable List, No Exclusions -------------------------------------------------------------- cable_size1.Add('Please Select Cable Size'); cable_size1.Add ('#1'); cable_size1.Add ('1/0'); cable_size1.Add ('2/0'); cable_size1.Add ('3/0'); cable_size1.Add ('4/0'); cable_size1.Add ('250'); cable_size1.Add ('300'); cable_size1.Add ('400'); cable_size1.Add ('500'); cb_test_2.DataSource = cable_size1; cb_test_2.SelectedIndex = 0; cb_test_2.DropDownStyle = ComboBoxStyle.DropDownList; //Initial DataBind for cable size ComboBox } private void InitializeSystemTypeCB() { //System Type List system_type_list.Add('Select System Type'); system_type_list.Add('3 Phase 3 Wire'); system_type_list.Add('3 Phase 4 Wire'); cb_test_3.DataSource = system_type_list; cb_test_3.SelectedIndex = 0; cb_test_3.DropDownStyle = ComboBoxStyle.DropDownList; //Initial DataBind for cb_system type ComboBox } private void Button1Click(object sender, System.EventArgs e) { if (!String.IsNullOrEmpty(cb_test_1.Text) && (!String.IsNullOrEmpty(cb_test_2.Text) && (!String.IsNullOrEmpty(cb_test_3.Text)))) { double a; if (cb_test_1.SelectedIndex != 0) { x = amperage_dictionary[amperage[cb_test_1.SelectedIndex]]; } if (cb_test_2.SelectedIndex != 0) { y = cable_dictionary_0[cable_size0[cb_test_2.SelectedIndex]]; } if (cb_test_3.SelectedIndex != 0) { z = system_type[system_type_list[cb_test_3.SelectedIndex]]; } a = ((x / y)*z); this.tb_1.Text = Math.Round(a,2).ToString(); } } private void InitializeSystemTypeLookup() { //System Type Dictionary this.system_type.Add(this.system_type_list[0], 0); this.system_type.Add(this.system_type_list[1], 3); this.system_type.Add(this.system_type_list[2], 4); } private void InitializeAmperageLookup() { //Amperage Dictionary this.amperage_dictionary.Add(this.amperage[0], 0); this.amperage_dictionary.Add(this.amperage[1], 400); this.amperage_dictionary.Add(this.amperage[2], 800); this.amperage_dictionary.Add(this.amperage[3], 1000); this.amperage_dictionary.Add(this.amperage[4], 1200); this.amperage_dictionary.Add(this.amperage[5], 1600); this.amperage_dictionary.Add(this.amperage[6], 2000); this.amperage_dictionary.Add(this.amperage[7], 2500); this.amperage_dictionary.Add(this.amperage[8], 3000); this.amperage_dictionary.Add(this.amperage[9], 3200); this.amperage_dictionary.Add(this.amperage[10], 4000); this.amperage_dictionary.Add(this.amperage[11], 5000); this.amperage_dictionary.Add(this.amperage[12], 6000); } private void InitializeCableLookup0() { //Cable Dictionary 0 used for cable quantity calculation this.cable_dictionary_0.Add (this.cable_size0[0], 0); this.cable_dictionary_0.Add (this.cable_size0[1], 130); this.cable_dictionary_0.Add (this.cable_size0[2], 150); this.cable_dictionary_0.Add (this.cable_size0[3], 175); this.cable_dictionary_0.Add (this.cable_size0[4], 200); this.cable_dictionary_0.Add (this.cable_size0[5], 230); this.cable_dictionary_0.Add (this.cable_size0[6], 255); this.cable_dictionary_0.Add (this.cable_size0[7], 285); this.cable_dictionary_0.Add (this.cable_size0[8], 355); this.cable_dictionary_0.Add (this.cable_size0[9], 380); this.cable_dictionary_0.Add (this.cable_size0[10], 720); this.cable_dictionary_0.Add (this.cable_size0[11], 475); } private void InitializeCableLookup1() { //Cable Dictionary 1 used for cable quantity calculation this.cable_dictionary_1.Add (this.cable_size1[0], 0); this.cable_dictionary_1.Add (this.cable_size1[1], 130); this.cable_dictionary_1.Add (this.cable_size1[2], 150); this.cable_dictionary_1.Add (this.cable_size1[3], 175); this.cable_dictionary_1.Add (this.cable_size1[4], 200); this.cable_dictionary_1.Add (this.cable_size1[5], 230); this.cable_dictionary_1.Add (this.cable_size1[6], 255); this.cable_dictionary_1.Add (this.cable_size1[7], 285); this.cable_dictionary_1.Add (this.cable_size1[8], 355); } } }
In InitializeCableSizeCB0(), make sure that you first remove any items from cable_size0, e.g:
Otherwise you will re-add the same items over and over again (every time InitializeCableSizeCB0() is called).