Problems updating the database - database

Question

I have attached code for reference. I am trying to create database for my project details. I have currently 2 forms:
main form
project detail form
Main form used to switch various forms
Project detail forms are meant for add / edit / load project details
My main form in visual basic look like this.
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
End Sub
Private Sub Bt_Project_Details_Click(sender As Object, e As EventArgs) Handles Bt_Project_Details.Click
Me.Hide()
Project_Details_Form.Show()
End Sub
End Class
My project detail form look like this.
Public Class Project_Details_Form
Private Sub Project_Details_Form_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Project_Data_Set.Project_Data_Table' table. You can move, or remove it, as needed.
Me.Project_Data_TableTableAdapter.Fill(Me.Project_Data_Set.Project_Data_Table)
End Sub
Private Sub Bt_Load_Project_Click(sender As Object, e As EventArgs) Handles Bt_Load_Project.Click
End Sub
Private Sub Bt_Cancel_Click(sender As Object, e As EventArgs) Handles Bt_Cancel.Click
Me.Hide()
Form1.Show()
End Sub
Private Sub BindingNavigatorAddNewItem_Click(sender As Object, e As EventArgs) Handles BindingNavigatorAddNewItem.Click
Project_Data_TableBindingSource.AddNew()
End Sub
Private Sub Project_Data_TableBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs) Handles Project_Data_TableBindingNavigatorSaveItem.Click
Me.Validate()
Me.Project_Data_TableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.Project_Data_Set)
End Sub
Private Sub BindingNavigatorDeleteItem_Click(sender As Object, e As EventArgs) Handles BindingNavigatorDeleteItem.Click
Project_Data_TableBindingSource.RemoveCurrent()
End Sub
Private Sub FillByToolStripButton_Click(sender As Object, e As EventArgs)
Try
Me.Project_Data_TableTableAdapter.FillBy(Me.Project_Data_Set.Project_Data_Table)
Catch ex As System.Exception
System.Windows.Forms.MessageBox.Show(ex.Message)
End Try
End Sub
End Class
Now I am facing a few problems:
Whenever I run the program, try to enter first entry data being saved but with empty value. The data enter next time being stored properly. How can make my first entry visible?
In below code:
Private Sub BindingNavigatorAddNewItem_Click(sender As Object, e As EventArgs) Handles BindingNavigatorAddNewItem.Click
Project_Data_TableBindingSource.AddNew()
End Sub
I am using AddNew(). This working fine, but problem is even I don't enter data like date, name kept empty, data recorded in their position is store empty only. I would like to say if any of project data set is empty give error message (since it mandatory for user to enter those data)

Answer 1

Is there any other method where i can assign value individually .
Like my Project database contain project name, customer name etc. if i say new button pressed clear all field. Once form filled individual value being record once save button pressed
Private Sub BindingNavigatorAddNewItem_Click(sender As Object, e As EventArgs) Handles BindingNavigatorAddNewItem.Click
Project_Data_TableBindingSource.AddNew()
End Sub