combo box datetime picker

ta mu

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.

12 Replies

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Iftikar Hussain13y ago
Accepted 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 (insid,insaccountno,ins_no,insamount,ins_status,date) 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
0

Uchiha Itachi12y ago

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 Hussain13y ago
what value you have bind for comboBox1
0
ta mu13y ago
not working
have warning
Warning 1 Possible unintended reference comparison; to get a value comparison, cast the left hand side to type 'string'
0
ta mu13y ago
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 (insid,insaccountno,ins_no,insamount,ins_status,date) 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; }
0
Iftikar Hussain13y ago
can you share your code?
0
ta mu13y ago
ok and the solution of combobox
0
Iftikar Hussain13y ago
by default it will always show the current date, then why you are getting the issue
0
ta mu13y ago
if no value is selected in both controls the show error select the values
0
Iftikar Hussain13y ago
what error message you want to display? and in what condition
0
ta mu13y ago
window form i am not entring this is simple combo box and andtetime picker sorry error will be select the values
0
Iftikar Hussain13y ago
Hi,
In winform, you can't enter date value manually in datetime picker. Are you asking in ASP.NET?

Regards,
Iftikar
0