不使用通用http处理程序显示二进制图像

Question

从下拉列表中选择学生ID时，我必须在我的网页上显示学生姓名和图像。该图像以db的二进制格式存储。我如何检索图像并在图像框中显示。下面给出的代码仅显示学生的名字和姓氏。如何在不使用http通用处理程序页面的情况下显示图像？请帮帮我。

代码：

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     DataSet1TableAdapters.TextBoxTableTableAdapter tx; 
     tx = new DataSet1TableAdapters.TextBoxTableTableAdapter(); 
     DataTable dt = new DataTable(); 
     dt = tx.GetstudData(int.Parse(DropDownList1.SelectedValue)); 

     foreach (DataRow row in dt.Rows) 
     { 
      TextBox1.Text = (row["FirstName"].ToString()); 
      TextBox2.Text = (row["SecondName"].ToString()); 
     } 
    } 

SQL查询：

SELECT FirstName, SecondName, StudentImage FROM TextBoxTable WHERE (Id = @Id) 

.aspx的来源：

<div> 
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"> 
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 
<asp:Image ID="Image1" runat="server" /> 
</div> 

数据库：

Answer 1

代码

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    DataSet1TableAdapters.TextBoxTableTableAdapter tx; 
    tx = new DataSet1TableAdapters.TextBoxTableTableAdapter(); 
    DataTable dt = new DataTable(); 
    dt = tx.GetstudData(int.Parse(DropDownList1.SelectedValue)); 
    foreach (DataRow row in dt.Rows) 
    { 
     TextBox1.Text = (row["FirstName"].ToString()); 
     TextBox2.Text = (row["SecondName"].ToString()); 
     byte[] barrImg = (byte[])(row["StudentImage"].ToString()); 
     string base64String = Convert.ToBase64String(barrImg , 0, barrImg.Length); 
     Image1.ImageUrl = "data:image/png;base64," + base64String; 
    } 
}' 

我认为这段代码会为你