1.將圖片存入資料庫

前臺程式碼：

<asp:FileUpload ID="FileUploadImage" runat="server" />

後臺程式碼：

需要的名稱空間using System.Data.SqlClient;  using System.Drawing;  using System.IO;

     /// <summary>
    /// 新增人員資訊
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        byte[] image = new byte[FileUploadImage.PostedFile.ContentLength];
        FileUploadImage.PostedFile.InputStream.Read(image, 0, FileUploadImage.PostedFile.ContentLength);

        #region //新增人員資訊到資料庫
        try 
        {
            string connString = System.Configuration.ConfigurationManager.ConnectionStrings["ApplicationServices"].ToString();
            SqlConnection conn = new SqlConnection(connString);
            SqlCommand command = new SqlCommand("insert into tblUser(Image) values (@image)",conn);
            command.Parameters.AddWithValue("@image",image);
            conn.Open();
            if (command.ExecuteNonQuery() > 0)
            {
                ScriptManager.RegisterStartupScript(this.Page,this.GetType(),"Success","alert('新增成功！')",true);
            }
            else
            {
                ScriptManager.RegisterStartupScript(this.Page,this.GetType(),"Error","alert('新增失敗')",true);
            }
            conn.Close();
        }
        catch (Exception ex)
        {
            ScriptManager.RegisterStartupScript(this.Page,this.GetType(),"Exception","alert('"+ex.Message+"')",true);
        }
        #endregion

    }
 

其實這只是用了一個變通的做法，原先是將image中src為圖片在伺服器上的儲存地址，而現在是將src換成一個頁面，而該頁面顯示的正是資料庫中的圖片。

在建立了一個新項後（暫時將該項命名為showImage.aspx），直接在後臺新增程式碼

protected void Page_Load(object sender, EventArgs e)
    {
        string connString = System.Configuration.ConfigurationManager.ConnectionStrings["ApplicationServices"].ToString();
        SqlConnection conn = new SqlConnection(connString);
        SqlCommand command = new SqlCommand("select image from tblUser where 
 
[email protected]", conn);
        command.Parameters.AddWithValue("@id",Request.QueryString["id"]);
        conn.Open();

        byte[] buffer = (byte[])command.ExecuteScalar();
        if (buffer == null) return;
        Response.ContentType = buffer.ToString();  //System.Byte[]
        Response.BinaryWrite(buffer);
    }
 

<asp:TemplateField HeaderText="登記圖片">
<ItemTemplate>
<image src="showImage.aspx?id=<%#Eval("ID") %>"></image>    
        </ItemTemplate>
</asp:TemplateField>