programming

Efe Onah Ojobo

i wrote a code to enable users add item to listBox clears the items from the textBox1 and ComboBox1.But wen i real click without inputing any thing,the textBox1 gives space in the listBox and the ComboBox1 add the previous item that was selected when not as been selected.

How do i solve this problem and how to make the user no when he or she as not inputed any thing.

}

if (ComboBox1->Empty & textBox1->Empty==true)

Message->Show("Error");

}

but am getting errors

18 Replies

Know the answer? Post it — somebody with the same question will find it here.

Saroj Kumar Sahu11y ago
Accepted answer
Hi,
I have tried this ComboBox1.ResetText() to reproduce that error but its working for me and i'm not able to get this error.

So If you just want to clear the current selection, but leave all of the items in the list, you can use also
ComboBox1.SelectedIndex = -1; instead of ComboBox1.ResetText();

Hope this will help you.
Saroj Kumar Sahu11y ago
Hi Onah,

Always create a new thread for a question.It will be more helpful for you and will get result sooner than old thread.

Nilesh Jadav11y ago

You can use Required Field Validator for text box and Combobox, Give target ID/Control To Validate as "textBox1" and "Combobox1" and give error message as "your error".

"0"cellpadding="0"cellspacing="0">        
            
        
        
            
        
        
            
        
    
                  Enter Your Name 
                "server" id="txtTestForRequiredField">
            
                "RequiredFieldValidator1" forecolor="Red" errormessage="Please enter your name" controltovalidate="txtTestForRequiredField" runat="server">
            
                "Button1" text="Save" runat="server">

 

Thank you !

Upendra Pratap Shahi11y agoPosted Jun 25, 2015, 7:12 AM Kindly start a new thread for new question.
EOEfe Onah Ojobo11y agoPosted Jun 25, 2015, 7:03 AM how do you check to determine if ur textbox1 and combobox is empty so it can display messagebox
EOEfe Onah Ojobo11y agoPosted Jun 12, 2015, 8:54 AM good day to you sir. i tried using the first one and that worked perfectly by clearing all the Items inthe ComboBox.But the Second one did not can you still help me out.it gave me this error. error C2039:'ResetText':Is not a member of 'System::Windows::Forms::ComboBoxObjectCollection'
Saroj Kumar Sahu11y agoPosted Jun 12, 2015, 7:13 AM Hi, To clear the all the items of the combobox : ComboBox1.Item.Clear(); To clear the selected text: ComboBox1.ResetText();
EOEfe Onah Ojobo11y agoPosted Jun 12, 2015, 4:45 AM How do you clear a text from a combo box
Upendra Pratap Shahi11y agoPosted Jun 12, 2015, 12:38 AM Make sure that you have used your control Id which have you give. Kindly accept if helpful.
EOEfe Onah Ojobo11y agoPosted Jun 11, 2015, 11:25 AM kk thanks
CKCarlos kambui11y agoPosted Jun 11, 2015, 10:25 AM first make sure you have named your control correctly then check event under which your codes will execute
EOEfe Onah Ojobo11y agoPosted Jun 11, 2015, 10:16 AM i wiill be greatful
EOEfe Onah Ojobo11y agoPosted Jun 11, 2015, 10:13 AM pls help me out
EOEfe Onah Ojobo11y agoPosted Jun 11, 2015, 9:55 AM i tried using is code if (string.IsNullOrEmpty(ComboBox1.SelectedIndex == -1) || string.IsNullOrEmpty(textBox1.Text)) { MessageBox.Show("Error"); } but am still getting errors like error C3861:'SetCompatibleTextextRenDefault':identifier not found error C3861:'Run':identifier not Found error C3861:'EnableVisualStyles':identifier not found error C2653:'Application':is not a clss or namespace error C2337:'STAThreadAttribute':attribute not found
Vincent Maverick Durano11y agoPosted Jun 11, 2015, 9:32 AM What have you tried and what is the error you are getting?
EOEfe Onah Ojobo11y agoPosted Jun 11, 2015, 9:04 AM sorry, just tried it am gave some errors
Upendra Pratap Shahi11y agoPosted Jun 11, 2015, 8:44 AM if (string.IsNullOrEmpty(ComboBox1.SelectedIndex == -1) || string.IsNullOrEmpty(textBox1.Text)) { MessageBox.Show("Error"); }
Saroj Kumar Sahu11y agoPosted Jun 11, 2015, 7:31 AM Hi, Please try the below code: if (string.IsNullOrEmpty(comboBox1.SelectedIndex == -1) || string.IsNullOrEmpty(textBox1.Text)) { MessageBox.Show("Error"); }