Remove the item from ComboBox once it's been selected in the previous

Question

I'm lost here, I wanna remove the item from ComboBox once it's been selected in the previous ComboBox. I have tried many approaches but didn't resolve this problem. Please help me in solving this problem and below I've included all of the code. Any tips would be greatly appreciated! ComboBox[] combo_for_constraint = new ComboBox[count]; int combo_for_constraint_x = 250, combo_for_constraint_y = 50; for ( int i = 1; i { combo_for_constraint[i] = new ComboBox(); combo_for_constraint[i].Location = new System.Drawing.Point(combo_for_constraint_x, combo_for_constraint_y + (i * 10)); combo_for_constraint[i].Size = new Size(100, 50); combo_for_constraint[i].Name = "combo_for_constraintbx" + i.ToString(); combo_for_constraint[i].DropDownStyle = ComboBoxStyle.DropDownList; tabPage2.Controls.Add(combo_for_constraint[i]); tabPage2.ResumeLayout( false ); combo_for_constraint_y += 40; tabPage2.Refresh(); if (i >= 2 && combo_for_constraint[i - 1].Text == "PRIMARY KEY" ) { combo_for_constraint[i + 1].Items.RemoveAt(1); } else { combo_for_constraint[i].Items.Add( "UNIQUE" ); combo_for_constraint[i].Items.Add( "PRIMARY KEY" ); combo_for_constraint[i].Items.Add( "FOREIGN KEY" ); } }

Muhammad Ahsan · Answer

void ComboBuild() { combo_for_constraint = new ComboBox[count]; int combo_for_constraint_x = 250, combo_for_constraint_y = 50; for ( int i = 0; i { combo_for_constraint[i] = new ComboBox(); combo_for_constraint[i].Location = new System.Drawing.Point(combo_for_constraint_x, combo_for_constraint_y + (i * 10)); combo_for_constraint[i].Size = new Size(100, 50); combo_for_constraint[i].Name = "combo_for_constraintbx" + i.ToString(); combo_for_constraint[i].DropDownStyle = ComboBoxStyle.DropDownList; tabPage2.Controls.Add(combo_for_constraint[i]); tabPage2.ResumeLayout( false ); combo_for_constraint_y += 40; tabPage2.Refresh(); combo_for_constraint[i].Items.Add( "UNIQUE" ); combo_for_constraint[i].Items.Add( "PRIMARY KEY" ); combo_for_constraint[i].Items.Add( "FOREIGN KEY" ); //combo_for_constraint[i].SelectedIndex = 0; combo_for_constraint[i].SelectedIndexChanged += new System.EventHandler(Combo1_SelectedIndexChanged); } } private void Combo1_SelectedIndexChanged( object sender, EventArgs e) { ComboBox comboBox = (ComboBox)sender; for ( int i = 0; i int .Parse(textBox3.Text); i++) { if (comboBox == combo_for_constraint[i] && combo_for_constraint[i].Text == "PRIMARY KEY" ) { for ( int j = 0; j int .Parse(textBox3.Text); j++) { if (combo_for_constraint[j].Text == "PRIMARY KEY" ) { continue ; } else combo_for_constraint[j].Items.Remove( "PRIMARY KEY" ); } } } } Finally solved

Tamil Rk · Answer

Hello Muhammad Ahsan, Try the below code. If the below code does not solve your problem, please explain what is the exact requirement. I have corrected based on shared your code knowledge. let me know if you need any help with this requirement. ComboBox[] combo_for_constraint = new ComboBox[10]; int combo_for_constraint_x = 250, combo_for_constraint_y = 50; for ( int i = 1; i { combo_for_constraint[i] = new ComboBox(); combo_for_constraint[i].Location = new System.Drawing.Point(combo_for_constraint_x, combo_for_constraint_y + (i * 10)); combo_for_constraint[i].Size = new Size(100, 50); combo_for_constraint[i].Name = "combo_for_constraintbx" + i.ToString(); combo_for_constraint[i].DropDownStyle = ComboBoxStyle.DropDownList; panel1.Controls.Add(combo_for_constraint[i]); panel1.ResumeLayout( false ); combo_for_constraint_y += 40; panel1.Refresh(); combo_for_constraint[i].Items.Add( "UNIQUE" ); combo_for_constraint[i].Items.Add( "PRIMARY KEY" ); combo_for_constraint[i].Items.Add( "FOREIGN KEY" ); if (i >= 2) { combo_for_constraint[i].Items.Remove(combo_for_constraint[i - 1].Text); } combo_for_constraint[i].SelectedIndex = 0; } Good Luck.