c#

Question

how do you check if your comboBox and textbox is empty,so it can display the message box

Bharathi Raja · Answer

if (comboBox1.SelectedIndex==-1 || textbox1.text== "" ) { MessageBox.Show( "You must select a conversion type" , "Error" ); } else { MessageBox.Show( "Selected" ); }

Rajeesh Menoth · Answer

Hi, if (string.IsNullOrWhiteSpace(TextBox.Text) && string.IsNullOrEmpty(comboBox1.Text)) { // Message box }

Jignesh Trivedi · Answer

hi, what you mean combo box is empty? combo does not contain value or not selected any value?

Bhushan Bhasme · Answer

YOu can Place It Into try and catch block....and in catch block you can have message box

Efe Onah Ojobo · Answer

tried it error value cannot be null (comboBox)

Efe Onah Ojobo · Answer

tried it error value cannot be null

Jaipal Reddy · Answer

if (string.IsNullOrWhiteSpace(TextBox.Text) { MessageBox.show("--Msg--"); } if(string.IsNullOrEmpty(comboBox1.Text)) { MessageBox.show("--Msg--"); }

Ravi Kumar · Answer

hi check if(!string.IsNullOrEmpty(textbox1.text)) { } if(!string.IsNullOrEmpty(combobox.text)) { }

Bhushan Bhasme · Answer

if(comboBox1.Items.Count()==0 ) { //do something MessageBox.show("Please Add Some items To Combobox"); } if(String.IsNullOrEmpty(txtSample.text)) { //do something MessageBox.show("Please Enter Some Text"); } Hop This Will Help You

c#

Answers (9)