1、新建一个数据库,数据库名为Image,表名为image。并为表添加ID,tupian两个列。
2、新建一个项目(Photo),在工具箱中往窗体中拖入一个PictureBox控件,两个Button按钮,一个OpenFileDialog控件。并修改pictureBox1控件的属性BorderStyle为FixedSingle,SizeMode为StretchImage;修改两个button控件属性的Text值依次为”打开一张图片”“插入数据库”。
3、首先打开“数据“选择“添加新数据源”,然后(数据库)下一步,(数据集)下一步,选择”新建连接“,依次选择服务器名,服务器验证方式,选择”选择或输入一个数据库名。
4、选择”选择或输入一个数据库名,添加刚刚新建的数据库,然后点击“测试连接”,看看数据库连接是否成功。成功后点“确定”回到“数据源配置向导”页面,将“连接字符串复制下来。
5、添加两条using命名空间 using System.IO using System.Data.SqlClient作用为读取二进制数据流,用于数据库的连接。
6、编辑Button按钮“打开一张图片”的Click事件。
7、编写Button按钮“插入数据库:的Click事件。
1.将图片以二进制存入数据库//保存图片到数据库
protected void Button1_Click(object sender, EventArgs e)
{
//图片路径
string strPath = "~/photo/03.JPG"
string strPhotoPath = Server.MapPath(strPath)
//读取图片
FileStream fs = new System.IO.FileStream(strPhotoPath, FileMode.Open, FileAccess.Read)
BinaryReader br = new BinaryReader(fs)
byte[] photo = br.ReadBytes((int)fs.Length)
br.Close()
fs.Close()
//存入
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1Initial Catalog=TestDBUser ID=saPassword=sa")
string strComm = " INSERT INTO personPhoto(personName, personPhotoPath, personPhoto) "
strComm += " VALUES('wangwu', '" + strPath + "', @photoBinary )"
SqlCommand myComm = new SqlCommand(strComm, myConn)
myComm.Parameters.Add("@photoBinary", SqlDbType.Binary,photo.Length)
myComm.Parameters["@photoBinary"].Value = photo
myConn.Open()
myComm.ExecuteNonQuery()
myConn.Close()
}
2.读取二进制图片在页面显示
//读取图片
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1Initial Catalog=TestDBUser ID=saPassword=sa")
string strComm = " SELECT personPhoto FROM personPhoto WHERE personName='wangwu' "
SqlCommand myComm = new SqlCommand(strComm, myConn)
myConn.Open()
SqlDataReader dr = myComm.ExecuteReader()
while (dr.Read())
{
byte[] photo = (byte[])dr["personPhoto"]
this.Response.BinaryWrite(photo)
}
dr.Close()
myConn.Close()
或
SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1Initial Catalog=TestDBUser ID=saPassword=sa")
SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn)
DataSet myds = new DataSet()
myConn.Open()
myda.Fill(myds)
myConn.Close()
byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"]
this.Response.BinaryWrite(photo)
3.设置Image控件显示从数据库中读出的二进制图片
---------------------------------------------
SqlConnection myConn = new SqlConnection("Data Source=192.168.0.1Initial Catalog=TestDBUser ID=saPassword=sa")
SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn)
DataSet myds = new DataSet()
myConn.Open()
myda.Fill(myds)
myConn.Close()
byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"]
//图片路径
string strPath = "~/photo/wangwu.JPG"
string strPhotoPath = Server.MapPath(strPath)
//保存图片文件
BinaryWriter bw = new BinaryWriter(File.Open(strPhotoPath,FileMode.OpenOrCreate))
bw.Write(photo)
bw.Close()
3.显示图片
this.Image1.ImageUrl = strPath
4.GridView中ImageField以URL方式显示图片
--------------------------
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="personName" HeaderText="姓名" />
<asp:ImageField DataImageUrlField="personPhotoPath"
HeaderText="图片">
</asp:ImageField>
</Columns>
</asp:GridView>
5.GridView显示读出的二进制图片
//样板列
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound">
<Columns>
<asp:BoundField DataField="personName" HeaderText="姓名" />
<asp:ImageField DataImageUrlField="personPhotoPath"
HeaderText="图片">
</asp:ImageField>
<asp:TemplateField HeaderText="图片">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowIndex <0)
return
// System.ComponentModel.Container
string strPersonName = (string)DataBinder.Eval(e.Row.DataItem, "personName")
Image tmp_Image = (Image)e.Row.Cells[2].FindControl("Image1")
if (!System.Convert.IsDBNull(DataBinder.Eval(e.Row.DataItem, "personPhoto")))
{
//
byte[] photo = (byte[])DataBinder.Eval(e.Row.DataItem, "personPhoto")
//图片路径
string strPath = "~/photo/" + strPersonName.Trim() + ".JPG"
string strPhotoPath = Server.MapPath(strPath)
//保存图片文件
BinaryWriter bw = new BinaryWriter(File.Open(strPhotoPath, FileMode.OpenOrCreate))
bw.Write(photo)
bw.Close()
//显示图片
tmp_Image.ImageUrl = strPath
}
}
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