从SQL Server数据库提取图片并显示在DataGrid

下面的代码实现从SQL Server数据库提取图片并显示在DataGrid的功能。

下面就是完整的代码，拷贝即可运行：

<%@ Page Language="vb" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

用户列表

Sub Page_Load(sender As Object, e As EventArgs)
If Not Page.IsPostBack Then
BindGrid()
End If
End Sub
Private Sub BindGrid()
Dim strCnn As String = "Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;"
Dim myConnection As SqlConnection = New SqlConnection(strCnn)
Dim myCommand As SqlCommand = New SqlCommand("SELECT * FROM Person", myConnection)
myCommand.CommandType = CommandType.Text
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(strArgument) as String
Return ("ReadImage.aspx?id=" & strArgument)
End Function

从数据库中取得照片并显示在DataGrid中

' ID="Label1"/>

' ID="Label2"/>

' ID="Label3"/>

' ID="Label4"/>

' />

ReadImage.aspx

<%@ Page Language="vb" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

Public Sub Page_Load(sender As Object, e As EventArgs)
Dim strImageID as String = Request.QueryString("id")
Dim myConnection As New SqlConnection("Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;")
Dim myCommand As New SqlCommand("Select PersonImageType, PersonImage from Person Where PersonID=" _
+ strImageID, myConnection)
Try
myConnection.Open()
Dim myDataReader as SqlDataReader
myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
Do While (myDataReader.Read())
Response.ContentType = myDataReader.Item("PersonImageType")
Response.BinaryWrite(myDataReader.Item("PersonImage"))
Loop
myConnection.Close()
Catch SQLexc As SqlException
End Try
End Sub

C# 版本

DataGridShowImage.aspx

<%@ Page language="c#" debug="true" Codebehind="DataGridShowImage.aspx.cs" AutoEventWireup="false"
Inherits="eMeng.Exam.DataGridShowImage.DataGridShowImage" %>


从数据库中取得照片并显示在DataGrid中

从数据库中取得照片并显示在DataGrid中

' ID="Label1"/>

' ID="Label2"/>

' ID="Label3"/>

' ID="Label4"/>

' />

DataGridShowImage.aspx.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace eMeng.Exam.DataGridShowImage
{
///
/// DataGridShowImage 的摘要说明。
///
public class DataGridShowImage : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DG_Persons;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!this.IsPostBack)
{
BindGrid();
}
}
private void BindGrid()
{
string strCnn = "Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;";
SqlConnection myConnection = new SqlConnection(strCnn);
SqlCommand myCommand = new SqlCommand("SELECT * FROM Person", myConnection);
myCommand.CommandType = CommandType.Text;
try
{
myConnection.Open();
DG_Persons.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
DG_Persons.DataBind();
}
catch(SqlException SQLexc)
{
Response.Write("提取数据时出现错误：" + SQLexc.ToString());
}
}
protected string FormatURL(object strArgument)
{
return "ReadImage.aspx?id=" + strArgument.ToString();
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}

ReadImage.aspx

<%@ Page language="c#" Codebehind="ReadImage.aspx.cs" AutoEventWireup="false"
Inherits="eMeng.Exam.DataGridShowImage.ReadImage" %>

ReadImage.aspx.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Data.SqlClient;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace eMeng.Exam.DataGridShowImage
{
///
/// ReadImage 的摘要说明。
///
public class ReadImage : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
string strImageID = Request.QueryString["id"];
SqlConnection myConnection = new SqlConnection("Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;");
SqlCommand myCommand = new SqlCommand("Select PersonImageType, PersonImage from Person Where PersonID="
+ strImageID, myConnection);
try
{
myConnection.Open();
SqlDataReader myDataReader;
myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
if(myDataReader.Read())
{
Response.Clear();
Response.ContentType = myDataReader["PersonImageType"].ToString();
Response.BinaryWrite((byte[])myDataReader["PersonImage"]);
}
myConnection.Close();
}
catch (SqlException SQLexc)
{
}
Response.End();
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}