在sqlserver中的图片类型是image 然后,通过dataset保存到数据库中,通过showimg.aspx文件来读出图片,即显示图片,代码如下: Dim image As Byte() = IssueQuestionRow.QuestionImage '/转换为支持存储区为内存的流 Dim memStream As New System.IO.MemoryStream(image) '/定义并实例化Bitmap对象 Dim bm As New Bitmap(memStream) '/根据不同的条件进行输出或者下载; Response.Clear() '/如果请求字符串指定下载,就下载该文件; '/否则,就显示在浏览器中。 If Request.QueryString("Download") = "1" Then Response.Buffer = True Response.ContentType = "application/octet-stream" '/这里下载输出的文件名字 ok.jpg 为例子,你实际中可以根据情况动态决定。 Response.AddHeader("Content-Disposition", "attachment;filename=ok.jpg") Else Response.ContentType = "image/jpg" End If Response.BinaryWrite(image) Response.End() 然后通过需要调用显示图片的页面,加入 <img src=”./showimg.aspx” wigth=”100px” height=”50”> 来固定图片的显示位置、大小等。 当然也可以通过一个页面的不同参数来获得不同的图片,如下代码: Showimg.aspx文件: Public QuestionID As String Public ChapterID As String Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load '在此处放置初始化页的用户代码 If Not IsPostBack Then QuestionID = Request.QueryString("QID") ChapterID = Request.QueryString("ChapterID") Exercise = EXH.GetExercise(ChapterID) Dim dv As New DataView(Exercise.Ex_IssueQuestion) dv.RowFilter = "QuestionID='" + QuestionID + "'" If dv.Count > 0 Then IssueQuestionRow = dv.Item(0).Row Dim image As Byte() = IssueQuestionRow.QuestionImage '/转换为支持存储区为内存的流 Dim memStream As New System.IO.MemoryStream(image) '/定义并实例化Bitmap对象 Dim bm As New Bitmap(memStream) '/根据不同的条件进行输出或者下载;
Response.BinaryWrite(image) End If End If End Sub 在其他需要调用的地方的aspx页面里只需写:<img src=”./showimg.aspx?QuestionID=222&ChapterID=3” wigth=”100px” height=”50”>即可
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