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Read the following : Storing and Retrieving Images from SQL Server Using Strored Procedures and C#.net[^]

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这是简单的代码段，使用FileUpload控件将图像存储在SQL中.

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This is simple code snippets which stores image in SQL using FileUpload control

FileStream file = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
            BinaryReader str1 = new BinaryReader(file);
            byte[] bit = str1.ReadBytes(Convert.ToInt32( file.Length));
            SqlConnection connection = new SqlConnection("server=(local);database=test;integrated security=true");
            connection.Open();
            SqlCommand command = new SqlCommand();
            command.Connection = connection;
            command.CommandType = CommandType.Text;
            command.Parameters.AddWithValue("@Photo",bit);
            command.CommandText = "INSERT INTO image1(pic) VALUES (@Photo)";
            command.ExecuteNonQuery();
            connection.Close();

您要将图像文件存储在数据库中，请转到以下位置:-
首先获取FileUpload控件，并提供该控件的ID，例如fileUpload.
现在在button_Click上单击一个按钮，编写以下代码:-

You want to store your image file in database o.k here you go:-
first take a FileUpload Control provide the Id of this control say fileUpload.
now take a button on button_Click write the following code:-

int length = fileUpload.PostedFile.ContentLength;
byte[] imgByte = new byte[length];
HttpPostedFile hpf = fileUpload.PostedFile;
hpf.InputStream.Read(imgByte, 0, length);

现在将imgByte对象插入数据库.
记住您的数据库列的数据类型必须为Image类型的图像.

Now insert imgByte object into your database.
Remember datatype of your database column for Image must of type Image.