使用c＃将日期时间插入sql server 2008

Question

I get failed to convert parameter value from a string to a datetime error, I have a text box in which the user should insert a date, my code is:

SqlConnection Con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\targil3.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");
SqlDataAdapter adapt = new SqlDataAdapter();
adapt.InsertCommand = new SqlCommand("INSERT INTO tblEmployee VALUES (@employeeNumber, @employeePrivateName, @employeeFamilyName ,@city, @street, @houseNo, @phoneNumber, @birthDate, @startWorkingDate)", Con);
adapt.InsertCommand.Parameters.Add("@employeeNumber", SqlDbType.VarChar).Value = textBox1.Text;
adapt.InsertCommand.Parameters.Add("@employeePrivateName", SqlDbType.VarChar).Value = textBox2.Text;
adapt.InsertCommand.Parameters.Add("@employeeFamilyName", SqlDbType.VarChar).Value = textBox3.Text;
adapt.InsertCommand.Parameters.Add("@city", SqlDbType.VarChar).Value = textBox4.Text;
adapt.InsertCommand.Parameters.Add("@street", SqlDbType.VarChar).Value = textBox5.Text;
adapt.InsertCommand.Parameters.Add("@houseNo", SqlDbType.Int).Value = textBox6.Text;
adapt.InsertCommand.Parameters.Add("@phoneNumber", SqlDbType.VarChar).Value = textBox7.Text;
adapt.InsertCommand.Parameters.Add("@birthDate", SqlDbType.DateTime).Value = textBox8.Text;
adapt.InsertCommand.Parameters.Add("@startWorkingDate", SqlDbType.DateTime).Value = textBox9.Text;

Con.Open();
adapt.InsertCommand.ExecuteNonQuery();
Con.Close();

How do I get it to work?

Answer 1

I guess the problem is here:

adapt.InsertCommand.Parameters.Add("@birthDate", SqlDbType.DateTime).Value = textBox8.Text;

You are specifying type to be of DateTime type and you are passing it a string. Try converting your string value to DateTime type object like:

adapt.InsertCommand.Parameters.Add("@birthDate", SqlDbType.DateTime).Value 
        = Convert.ToDateTime(textBox8.Text);

You may look into DateTime.ParseExact or DateTime.TryParseExact , if you get format exception during parsing. See: Customized DateTime Formats .

Answer 2

you could ideally set the adapt.InsertCommand to a variable and use it instead (both perf. and less typing)

assuming you guaranty the correct format for the text of textbox, change the lines with datetime parameters like this

adapt.InsertCommand.Parameters.Add("@birthDate", SqlDbType.DateTime).Value = DateTime.Parse(textBox8.Text, "yyyy/MM/dd");