how to search and update data into ms access - vb.net

Question

my problem is how to search data and update it in ms access and vb.net
my code:
Imports System.Data.OleDb
Public Class Form5
Dim provider As String
Dim dataFile As String
Dim connString As String
Public myConnection As OleDbConnection = New OleDbConnection
Public dr As OleDbDataReader
Private Sub Form5_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
provider = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source ="
dataFile = "C:\Users\Admin\Desktop\project database\Database5.accdb"
connString = provider & dataFile
myConnection.ConnectionString = connString
End Sub
Private Sub Button2_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button2.Click
Me.Close()
End Sub
Private Sub Button3_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button3.Click
myConnection.Open()
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
TextBox6.Clear()
TextBox7.Clear()
TextBox8.Clear()
TextBox9.Clear()
TextBox10.Clear()
TextBox11.Clear()
Dim str As String
str = "SELECT * FROM registration WHERE (Name = '" & TextBox1.Text & "')"
Dim cmd As OleDbCommand = New OleDbCommand(str, myConnection)
dr = cmd.ExecuteReader
While dr.Read()
TextBox2.Text = dr("No").ToString
TextBox3.Text = dr("Name").ToString
TextBox4.Text = dr("Age").ToString
TextBox5.Text = dr("Gender").ToString
TextBox6.Text = dr("Phone").ToString
TextBox7.Text = dr("Address").ToString
TextBox8.Text = dr("Desease").ToString
TextBox9.Text = dr("RoomNo").ToString
TextBox10.Text = dr("Building").ToString
TextBox11.Text = dr("RoomType").ToString
End While
myConnection.Close()
End Sub
End Class
the error I'm getting:
"No value given for one or more required parameters."}

Answer 1

Isn't the issue here that when you click button3 you clear the textbox1 where I assume you type the name you wish to search. So its throwing you an error that there is nothing in that field. And even if you type something after wards, and click the button again, it will clear it again before it starts searching. so basically, you're searching for nothing.