C# · 12月 25, 2021

C#保存图片到数据库并读取显示图片的方法

复制代码 代码如下:
private void button2_Click_1(object sender,System.EventArgs e)

{

string pathName;

if (this.openFileDialog1.ShowDialog()==System.Windows.Forms.DialogResult.OK)

{

pathName = this.openFileDialog1.FileName;

System.Drawing.Image img = System.Drawing.Image.FromFile(pathName);

this.picture@R_825_2419@1.Image = img;

//将图像读入到字节数组

System.IO.FileStream fs = new System.IO.FileStream(pathName,System.IO.FileMode.Open,System.IO.FileAccess.Read);

byte[] buffByte = new byte[fs.Length];

fs.Read(buffByte,(int)fs.Length);

fs.Close();

fs = null;

//建立Command命令

string comm = @”Insert into table1(img,name) values(@img,@name)”;

this.sqlCommand1 = new System.Data.sqlClient.sqlCommand ();

this.sqlCommand1.CommandType = System.Data.CommandType.Text ;

this.sqlCommand1.CommandText = comm;

this.sqlCommand1.Connection = this.sqlConnection1 ;

//创建Parameter

this.sqlCommand1.Parameters.Add(“@img”,System.Data.sqlDbType.Image);

this.sqlCommand1.Parameters[0].Value = http://www.jb51.net/ianakin/archive/2012/02/02/buffByte;

this.sqlCommand1.Parameters.Add(“@name”,System.Data.sqlDbType.VarChar);

this.sqlCommand1.Parameters[1].Value =http://www.jb51.net/ianakin/archive/2012/02/02/pathName.Substring(pathName.LastIndexOf(“\\”)+1);

try

{

this.sqlConnection1.open();

this.sqlCommand1.ExecuteNonQuery();

this.sqlConnection1.Close();

}

catch(System.Exception ee)

{

Message@R_825_2419@.Show(ee.Message );

}

buffByte = null;

this.FillList@R_825_2419@();

}

读取:

从数据库读图片到picture@R_825_2419@
复制代码 代码如下:
sqlConnection conn=new sqlConnection(@”data source=chenyuming2004VSdotNET;uid=sa;pwd=cym;database=lhf”);

conn.open();

sqlCommand cmd=new sqlCommand(“select 照片 from fuser where password=’1b'”,conn);

sqlDataReader reader=cmd.ExecuteReader();

reader.Read();

MemoryStream buf=new MemoryStream((byte[])reader[0]);

Image image=Image.FromStream(buf,true);

picture@R_825_2419@1.Image=image;