不允许从数据类型 varchar 到 varbinary 的隐式转换

I am trying to add data from Visual studio into an SQL database:

代码如下:

Imports System.Data.SqlClient
SELECT CONVERT(varchar(100), CONVERT(varbinary(max),'0xFFD8FFE000'))
Public Class Form1

Dim Conn As SqlConnection
Dim CMD As SqlCommand

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Conn = New SqlConnection
    Conn.ConnectionString = "Data Source=BYG-A101-MOELKA;Initial Catalog=App;Integrated Security=True"
    Dim READER As SqlDataReader

    Try

        Conn.Open()
        Dim Query As String
        Query = "insert into person (ID,firstname,lastname,age) values ('" & TextBox1.Text & "', '" & TextBox2.Text & "', '" & TextBox3.Text & "', '" & TextBox4.Text & "')"

        CMD = New SqlCommand(Query, Conn)
        READER = CMD.ExecuteReader
        MessageBox.Show("Datasaved")

        Conn.Close()

    Catch ex As Exception
        MessageBox.Show(ex.Message)
    Finally
        Conn.Dispose()

    End Try


End Sub

推荐答案

一些问题

ExecuteReader 不应用于插入
使用 ExecuteNonQuery