set country code as default value in a textbox in c#

Question

Sir I am doing a error prone project at the moment.

I have a comboBox and a textbox.

the combobox stands for coutry list and textbox for phone number.

when i select a country from the combobox list, i need that country's code to be enter automatically to the taxtbox.
also the value entered in the textbox doesn't be removed when i enter phone number in it

please help me on this topic

Iftikar Hussain · Answer

Hi, You can do like below private void Form10_Load(object sender, EventArgs e) { // Create a List to store our KeyValuePairs List > data = new List >(); // Add data to the List data.Add(new KeyValuePair ("91", "India")); data.Add(new KeyValuePair ("92", "Pakistan")); data.Add(new KeyValuePair ("93", "Sri Lanka")); // Clear the combobox comboBox1.DataSource = null; comboBox1.Items.Clear(); // Bind the combobox comboBox1.DataSource = new BindingSource(data, null); comboBox1.DisplayMember = "Value"; comboBox1.ValueMember = "Key"; } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { // Get the selected item in the combobox KeyValuePair selectedPair = (KeyValuePair )comboBox1.SelectedItem; // Show selected information on screen textBox1.Text = selectedPair.Key; } Regards, Iftikar

Sanjeeb Lenka · Answer

hello check this code: bind your combo box like this SqlConnection con = new SqlConnection("your connection string"); SqlCommand cmd = new SqlCommand("select Countrycode,Countryname from countrytable", con); SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); da.Fill(ds); comboBox1.ValueMember = "Countrycode"; comboBox1.DisplayMember = "Countryname"; comboBox1.DataSource = ds.Tables[0]; then in comboBox1_SelectedIndexChanged event write the below code private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { textBox1.Text = comboBox1.SelectedValue.ToString(); } any problem reply

Bineesh VP · Answer

No My project is windows form. the possible contents you given is not a relation with my project

Iftikar Hussain · Answer

Hi, Are you trying to do this in WebApplication or WindowsApplication? Regards, Iftikar

set country code as default value in a textbox in c#

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Answers (4)