combo box datetime picker

Question

i want to check if combo box or datetimer picker selected value is empty show error enter the values. how i can do this i dont know the correct formate.

Iftikar Hussain · Answer

you can try like this private void button1_Click(object sender EventArgs e) { if(ins_id.Text!= && insaccountno.Text!= && ins_no.Text!= && insamount.Text!= && comboBox1.SelectedValue!=) { SqlConnection my = new SqlConnection(@ Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\heaven_prince2009\Desktop\final pr latest\final pr\Database1.mdf;Integrated Security=True;User Instance=True); my.Open(); SqlCommand cmd = new SqlCommand(INSERT INTO add_installment (insidinsaccountnoins_noinsamountins_statusdate) VALUES (' + insid.Text + '' + insaccountno.Text + '' + insno.Text + '' + insamount.Text + '' + comboBox1.SelectedValue + ''+ ins_datetime.Value +') my); cmd.ExecuteNonQuery(); MessageBox.Show(Data Inserted Successfully); insid.Text = string.Empty; insaccountno.Text = string.Empty; insno.Text = string.Empty; insamount.Text = string.Empty; comboBox1.SelectedValue = string.Empty; } else { MessageBox.Show(enter the values); } } Regards Iftikar

Uchiha Itachi · Answer

I googled this piece of C# code for combo box control . Hope this be assistant. GridComboBoxColumn supplierColumn = new GridComboBoxColumn(); supplierColumn.Name = PorductsColumn ; supplierColumn.HeaderText = Porducts ; supplierColumn.DataSource = this .porductsBindingSource; supplierColumn.ValueMember = PorductID ; supplierColumn.DisplayMember = PorductName ; supplierColumn.FieldName = PorductsID ; supplierColumn.Width = 150; this .ketticGridView1.Columns.Add(supplierColumn);

Iftikar Hussain · Answer

what value you have bind for comboBox1

ta mu · Answer

not working have warning Warning 1 Possible unintended reference comparison; to get a value comparison cast the left hand side to type 'string'

ta mu · Answer

i want if no value is selected from combobox then show error select the value the code given below is not working comboBox1.SelectedValue== is not working. private void button1_Click(object sender EventArgs e) { if (ins_id.Text==||insaccountno.Text==||ins_no.Text==||insamount.Text==||comboBox1.SelectedValue==) { MessageBox.Show(enter the values); } else { SqlConnection my = new SqlConnection(@ Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\heaven_prince2009\Desktop\final pr latest\final pr\Database1.mdf;Integrated Security=True;User Instance=True); my.Open(); SqlCommand cmd = new SqlCommand(INSERT INTO add_installment (insidinsaccountnoins_noinsamountins_statusdate) VALUES (' + insid.Text + '' + insaccountno.Text + '' + insno.Text + '' + insamount.Text + '' + comboBox1.SelectedValue + ''+ ins_datetime.Value +') my); cmd.ExecuteNonQuery(); MessageBox.Show(Data Inserted Successfully); insid.Text = string.Empty; insaccountno.Text = string.Empty; insno.Text = string.Empty; insamount.Text = string.Empty; comboBox1.SelectedValue = string.Empty; }

Iftikar Hussain · Answer

can you share your code?

ta mu · Answer

ok and the solution of combobox

Iftikar Hussain · Answer

by default it will always show the current date then why you are getting the issue

ta mu · Answer

if no value is selected in both controls the show error select the values

Iftikar Hussain · Answer

what error message you want to display? and in what condition

ta mu · Answer

window form i am not entring this is simple combo box and andtetime picker sorry error will be select the values

Iftikar Hussain · Answer

Hi In winform you can't enter date value manually in datetime picker. Are you asking in ASP.NET? Regards Iftikar