如何在vb.net中从数据库中检索二值图像并在网格视图中插入图像

如何使用vb.net从数据库检索二进制图像并将图像插入GridView

这是我的数据库

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image（id为整数，img为varbinary（max））

当您澄清所指的gridview类型时，下面介绍如何将数据插入数据库：

Using c As New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
   c.Open()
   Dim command = New SqlCommand("INSERT INTO yourtable(image) values (@image)", c)
   ' this is specific to the FileUploadControl but the idea is to get the
   'image in a byte array; however you do it, it doesn't matter
    Dim buffer(FileUpload1.PostedFile.ContentLength) As Byte
    FileUpload1.PostedFile.InputStream.Read(buffer, 0, buffer.Length)
    command.Parameters.AddWithValue("@image", buffer)
    command.ExecuteNonQuery()    
End Using

假设您谈论的是ASP.NET应用程序，您可以按如下方式将数据绑定到gridview：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataKeyNames="id" DataSourceID="SqlDataSource1">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                     <!--Trick to encode the bytes as a BASE64 string-->
                    <img width="100px" height="100px" src='data:image/png;base64,<%#System.Convert.ToBase64String(Eval("image"))%>' />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="Data Source=Your_ConnectionString_GoesHere" 
            ProviderName="System.Data.SqlClient" 
            SelectCommand="SELECT [id], [image] FROM [your_table_name_goes_here]">
        </asp:SqlDataSource>

' />

你在说什么类型的gridview？asp.net的gridview，Winform的gridview？什么