$$简单问50分。 winform+access 如何将图片上传到access。如何再显示出来。

[jhqjhq]

winform+access 如何将图片上传到access。如何再显示出来。


是access哦。

[jhqjhq]

最好有代码参考。谢谢

[Jack2013tong]

access的与sql server的方法一样呀

[孟子E章]

WebForm的例子可以参考

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Web;
using System.IO;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace eMeng.Exam
{
/// <summary>
/// Image2Access 的摘要说明。
/// </summary>
public class Image2Access : System.Web.UI.Page
{
protected System.Web.UI.HtmlControls.HtmlInputText MyFileName;
protected System.Web.UI.HtmlControls.HtmlInputFile MyFile;
protected System.Web.UI.HtmlControls.HtmlInputButton Submit1;
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
BindGrid();
}
private void BindGrid()
{
string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +Server.MapPath("Image2Access.mdb");
OleDbConnection myConnection = new OleDbConnection(strCnn);
OleDbCommand myCommand = new OleDbCommand("SELECT * FROM Person", myConnection);
myCommand.CommandType = CommandType.Text;
try
{
myConnection.Open();
DG_Persons.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
DG_Persons.DataBind();
}
catch(OleDbException 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 窗体设计器生成的代码
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);
}

/// <summary>
/// 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。
/// </summary>
private void InitializeComponent()
{
this.Submit1.ServerClick += new System.EventHandler(this.Submit1_ServerClick);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void Submit1_ServerClick(object sender, System.EventArgs e)
{
//得到提交的文件
Stream fileDataStream = MyFile.PostedFile.InputStream;

//得到文件大小
int fileLength = MyFile.PostedFile.ContentLength;

//创建数组
byte[] fileData = new byte[fileLength];

//把文件流填充到数组
fileDataStream.Read(fileData,0,fileLength);

//得到文件名字
string fileTitle = MyFileName.Value;

//得到文件类型
string fileType = MyFile.PostedFile.ContentType;

//构建数据库连接，SQL语句，创建参数
string strCnn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Image2Access.mdb");
OleDbConnection myConnection = new OleDbConnection(strCnn);
OleDbCommand command = new OleDbCommand ("INSERT INTO Person (PersonName,PersonEmail,PersonSex,PersonImageType,PersonImage)" +
"VALUES (@PersonName,@PersonEmail,@PersonSex,@PersonImageType,@PersonImage)", myConnection);

System.Data.OleDb.OleDbParameter paramPersonName = new OleDbParameter("@PersonName", System.Data.OleDb.OleDbType.VarChar,50);
paramPersonName.Value = fileTitle;
command.Parameters.Add(paramPersonName);

System.Data.OleDb.OleDbParameter paramPersonEmail = new OleDbParameter("@PersonEmail", System.Data.OleDb.OleDbType.VarChar,50);
paramPersonEmail.Value = "[e-mail]";
command.Parameters.Add(paramPersonEmail);

System.Data.OleDb.OleDbParameter paramPersonSex = new OleDbParameter("@paramPersonSex", System.Data.OleDb.OleDbType.VarChar,50);
paramPersonSex.Value = "男";
command.Parameters.Add(paramPersonSex);

System.Data.OleDb.OleDbParameter paramPersonImageType = new OleDbParameter("@PersonImageType", System.Data.OleDb.OleDbType.VarChar,50);
paramPersonImageType.Value = fileType;
command.Parameters.Add(paramPersonImageType);

System.Data.OleDb.OleDbParameter paramPersonImage = new OleDbParameter("@PersonImage", System.Data.OleDb.OleDbType.Binary);
paramPersonImage.Value = fileData;
command.Parameters.Add(paramPersonImage);

//打开连接，执行查询
myConnection.Open();
command.ExecuteNonQuery();
myConnection.Close();


}
}
}

[jhqjhq]

如何读取呢？

[凨叔]

读取时强制转换成Image呀！
(Image)value

[jhqjhq]

如何读取并复直到 image中啊?
能不能不通过指定url方式显示啊?