我想从int64转换为字节

Question

failed to convert parameter value from int32 to a byte the database code

and the procedure in database is:

The webform code behind:

client c = new client();
c.name = Textbox_Addclient_first.Text + " " + Textbox_Addclient_second.Text + 
    " " + Textbox_Addclient_third.Text;
c.address = Textbox_addclientadress.Text;
c.phone = int.Parse(Textbox_addclientphone.Text);

The class code is:

SqlCommand com = new SqlCommand("add_client", con);

com.CommandType = CommandType.StoredProcedure;
com.Parameters.Add("@name", SqlDbType.NVarChar).Value = this.name;
com.Parameters.Add("@address", SqlDbType.NVarChar).Value = this.address;
com.Parameters.Add("@name", SqlDbType.TinyInt).Value = this.phone;
com.ExecuteNonQuery();
con.Close();

b = true;

Answer 1

This line:

com.Parameters.Add("@name", SqlDbType.TinyInt).Value = this.phone;

1. You are trying to pass the phone object to the name parameter.
2. You are using tinyint, varchar(10) would be a better option but if you insist on using integer, int64 should suffice.
3. If you are using int to make sure only digits are passed, do a regular expression check on the string for digits using "[0-9]{10}"