[英]Saving and retrieving image in SQL database from C# problem
我使用此代碼在數據庫的人員表中插入記錄
System.IO.MemoryStream ms = new System.IO.MemoryStream();
Image img = Image_Box.Image;
img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
this.personTableAdapter1.Insert(NIC_Box.Text.Trim(), Application_Box.Text.Trim(), Name_Box.Text.Trim(), Father_Name_Box.Text.Trim(), DOB_TimePicker.Value.Date, Address_Box.Text.Trim(), City_Box.Text.Trim(), Country_Box.Text.Trim(), ms.GetBuffer());
但是當我用這段代碼檢索到這個
byte[] image = (byte[])Person_On_Application.Rows[0][8];
MemoryStream Stream = new MemoryStream();
Stream.Write(image, 0, image.Length);
Bitmap Display_Picture = new Bitmap(Stream);
Image_Box.Image = Display_Picture;
它工作得很好,但是如果我用自己生成的查詢更新它,例如
System.IO.MemoryStream ms = new System.IO.MemoryStream();
Image img = Image_Box.Image;
img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
Query = "UPDATE Person SET Person_Image ='"+ms.GetBuffer()+"' WHERE (Person_NIC = '"+NIC_Box.Text.Trim()+"')";
下次我使用與上面相同的代碼來檢索圖像並顯示它。 程序拋出異常
所以誰能告訴我為什么我不知道。
Query = "UPDATE Person SET Person_Image =@pic WHERE (Person_NIC = '" + NIC_Box.Text.Trim() + "')";
SqlCommand cmd = new SqlCommand(Query);
SqlParameter picparameter = new SqlParameter();
picparameter.SqlDbType = SqlDbType.Image;
picparameter.ParameterName = "pic";
picparameter.Value = ms.GetBuffer();
cmd.Parameters.Add(picparameter);
db.ExecuteSQL(Query);
這個東西與這段代碼一起工作hurray lolz
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.