使用VB.NET 3.5从SQL Server2005检索DataGrid中的图像 [英] Retrive Image in DataGrid from sql server2005 USING VB.NET 3.5
本文介绍了使用VB.NET 3.5从SQL Server2005检索DataGrid中的图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
您好，所有专家，我都成功检索了除图像数据以外的所有数据，我无法找到我的错，所以请帮助我改善答案，我的代码如下:-
代码如下:-----
Hi All expert , i retrive all data sucessfully except image data , i could not be able to find my fault so please help me in improve my answer my code is as below :-
CODE BEHIND :-----
Imports System
Imports System.Data
Imports System.Data.SqlClient
Partial Class Default2
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
BindGrid()
End If
End Sub
Private Sub BindGrid()
'' Create Instance of Connection and Command Object
Dim myConnection As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("ConnectionString"))
Dim myCommand As SqlCommand = New SqlCommand("sp_das_person_real_images_sel", myConnection)
'' Mark the Command as a SPROC
myCommand.CommandType = CommandType.StoredProcedure
Try
myConnection.Open()
DG_Persons.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
DG_Persons.DataBind()
Catch SQLexc As SqlException
Response.Write("Error occured while Generating Data. Error is " & SQLexc.ToString())
End Try
End Sub
Function FormatURL(ByVal strArgument As String) As String
Return ("readrealimage.aspx?id=" & strArgument)
End Function
End Class
源代码:------
SOURCE CODE :------
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body style="font: 10pt verdana">
从SqlServer检索图像并在DataGrid中显示.
Retrieving images from SqlServer and Displaying in the DataGrid.
<form id="Form1" method="post" runat="server">
<asp:DataGrid ID="DG_Persons" AutoGenerateColumns="false" Width="99%" HeaderStyle-BackColor="#ff0000" HeaderStyle-Font-Bold="True"
HeaderStyle-Font-Name="Verdana" HeaderStyle-Font-Size="13px" HeaderStyle-ForeColor="#ffffff" ItemStyle-BackColor="Beige"
ItemStyle-Font-Name="verdana" ItemStyle-Font-Size="13px" BorderColor="#000000" Runat="server">
<columns>
<asp:TemplateColumn HeaderText="Name">
<itemtemplate>
<asp:Label ID="Label1" Runat="server" Text=''<%# DataBinder.Eval(Container.DataItem, "PersonName") %>''/> </itemtemplate>
<asp:TemplateColumn HeaderText="Email">
<itemtemplate>
<asp:Label ID="Label2" Runat="server" Text=''<%#DataBinder.Eval(Container.DataItem, "PersonEmail") %>''/>
</itemtemplate>
<asp:TemplateColumn HeaderText="Sex">
<itemtemplate>
<asp:Label ID="Label3" Runat="server" Text=''<%# DataBinder.Eval(Container.DataItem,"PersonSex") %>'' />
</itemtemplate>
<asp:TemplateColumn HeaderText="Date of Birth">
<itemtemplate>
<asp:Label ID="Label4" Runat="server" Text=''<%# DataBinder.Eval(Container.DataItem,"PersonDOB") %>''/>
</itemtemplate>
<asp:TemplateColumn HeaderText="Image">
<itemtemplate>
<asp:Image ID="Image1" Width="250" Height="225" ImageUrl=''<%# FormatURL(DataBinder.Eval(Container.DataItem,"PersonID").ToString) %>'' Runat="server">
</itemtemplate>
</columns>
</form>
</body>
</html>
推荐答案
您需要一个单独的页面，该页面带有图像ID，并返回带有正确标题的图像字节.然后，您需要为指向该页面的图像构建一个URL，并传入ID，以便它读取正确的图像. google上的大量信息.
You need a seperate page which takes an image ID and returns the bytes of the image with the right header. Then you need to build a URL for the image that points to that page, passing in the ID so it reads the right image. Tons of info on google on this.
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