Save Image in SQL Database

[Ashfield]

I couldn't be bothered to read all the posts, but if the data is actually being deleted in the database (check from Management Studio) then you need to refresh your dataset and rebind it to your control. Hope this helps

Bob Ashfield Consultants Ltd

[bapu2889]

hello sir could you please guide me how to do this because i have just started sql so i dont know much about it i mean i dont want code but just want to know where to start :confused: waiging for your kind rep. have a nice day

[Ashfield]

Its not in sql, its in your code. I assume yuo load data from the database into a dataset and then bind the datatable(s) within the dataset to controls. When you add or delete data you need to probably (depending on how you update your database) refresh your dataset and/or rebind the datatable(s) to the controls.

Bob Ashfield Consultants Ltd

[bapu2889]

hello again this is the code for add image

btnSave.Enabled = False
'get sql connection
Dim ImageAdd As Integer

    Try
        conImage = GetDBConnection()
        dsImage.BeginInit()

        Dim sSQL As String = "INSERT INTO Images (Pic,Title, IType, Height, Width) VALUES(" & \_
                       "@pic, @title, @itype, @iheight, @iwidth)"
        commImage = New Data.SqlClient.SqlCommand(sSQL, conImage)
        Call GetImage()
        ImageAdd = commImage.ExecuteNonQuery()
        Me.daImage.Update(Me.dsImage, "Images")

        dsImage.AcceptChanges()
        MessageBox.Show(ImageAdd.ToString & "  Image successfuly saved in database", "Image Load")
        dsImage.EndInit()

    Catch ex As Exception
        MsgBox(ex.Message)

    End Try
    commImage.Dispose()
    ' commImage = Nothing
    conImage.Close()
    conImage.Dispose()
    Call LoadImages()
End Sub

and when ever i add or delete image it refresh the the dataset i mean if ther is 3 images in database and if i want to delete image no. 3 after deleting image 3 it shows image no. 1 in picture that means it's reloading image that is what i am thinking :confused:

[Wendelius]

Hi again, Few additional questions - about the binding. Have you bound the dsImage dataset to a BindingSource and again a picture box to that BindingSource? - in LoadImages sub, what is the difference between ImagesTableAdapter and daImage? - in INSERT statement, you don't specify a value for ImageID-column, but that column is used in DELETE statement. How the ImageID get's it's value

[bapu2889]

hello again how are you thanks for your rep. yes i have dound picturebox to binding source , and i am trying so many things so i add imagestable adapter but daImage is i have drag and drop on form and went through adapter wizard and when i created Image table i have set primary key and identity specification set to yes so every time when i add new image to database it increment 1 by it self and in delete statement i have find record to delete it so it gets the ImageID from textbox all this is works fine but you know the problem so now i have no idea what to do :confused: waiting for your kind rep. and thanks again

[Wendelius]

Hmm, let's try to simplify this. Can you create a button and in that button call this sub (it may contain compilation errors since I wrote it in notepad). Let's see what you get with this:

Private Sub TestMethod()
Dim imageCount As Integer = dsImage.Images.Rows.Count

MsgBox("Original image count in dataset: " & CStr(imageCount))
conImage = GetDBConnection()
commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images WHERE ImageID = " & txtImageFile.Text, conImage)
If commImage.ExecuteNonQuery() <> 1 Then
MsgBox("Delete failed", MsgBoxStyle.Information)
End If
dsImage.Images.Clear()
dsImage.Images.AcceptChanges()
If dsImage.Images.Rows.Count <> 0 Then
MsgBox("Datatable not empty", MsgBoxStyle.Information)
End If
Me.ImagesTableAdapter.ClearBeforeFill = True
Me.ImagesTableAdapter.Fill(Me.dsImage.Images)
If (imagecount - 1 <> dsImage.Images.Rows.Count) Then
MsgBox("Delete not done, rows in datatable: " & CStr(dsImage.Images.Rows.Count), MsgBoxStyle.Information)
End If
End Sub

What do you get as result (information in messageboxes)?

[bapu2889]

hello again sorry for late i have test this and result are as bellow WITH 0 DATA COUNT FIRST MESSAGEBOX 1- Original Count in Database = 0 2- Error because there is no row in database so it shows error because of this

If commImage.ExecuteNonQuery() <> 1 Then
MsgBox("Delete failed", MsgBoxStyle.Information)
End If

after that i close application and rerun it and add one image in database so FIRST MSGBOX 1- Original Count in DB = 1 SECOND MSGBOX 2- Delete failed THIRD MSGBOX 3- Delete not done, Rows in datatable = 1 thanks again waiting for your rep.

[Wendelius]

No problem... So the problem in this case was that there wasn't a row to delete matching the condition. Try to change the delete statement:

commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images WHERE ImageID = (SELECT MAX(ImageID) FROM Images)", conImage)

This should delete the last image in images. Any difference?

[bapu2889]

hello again ok with empty DB 1 msgbox Original image count = 0 2 msgbox delete failed 3 msgbox Delete not done, rows in BD =0 and without closing application I add one image with original method and it shows msgbox that 1 image is saved, and then without closing application i click button to use your method still it shows that first msgbox= original image count = 0 and in second = Delete not done row in datatable=0, and when i click button second time without closing application so first msgbox is original image count =0 second msgbox is delete failed therd msgbox is row i datatable=0 so that means image has been saved in database and deleted when i click button to use your method and when i click button second so result was different and then add one image and rerun the application so it show one image in database and i can see the image in picturebox as well now i click button for your method so msgbox 1 Original Image count =1 msgbox2 = delete not done, row in datatable = 1 now i have click button second time without closing application so msgbox 1 Original Image count =1 msgbox 2 Delete Failed msgbox 3 delete not done, row in datatable = 1 so this is some thing else i think we are going to the right direction thanks waiting for your kind rep.

[Wendelius]

This is confusing... I thought that now the delete operation would have deleted 1 row. I think I must get some sleep but in the mean time if you could test this variation with one picture in database (this should delete ALL pictures):

commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images)", conImage)
...
If (dsImage.Images.Rows.Count > 0) Then
MsgBox("Delete not done, rows in datatable: " & CStr(dsImage.Images.Rows.Count), MsgBoxStyle.Information)
End If

I'll get back to this sometime tomorrow afternoon so don't hurry with this. If I'm reading the clock correctly it's past 10pm at your timezone so you could use some rest too. :) Mika

[bapu2889]

Hello again yes you are right it's 10.30 pm now so better to rest and get back to work tomorrow but thank you very much for your help take care :)

[bapu2889]

hello again yes i have tried new quary but still it's not working waiting for your kind rep.

[Wendelius]

Hi again, What was the output from these (rowcount)?

MsgBox("Original image count in dataset: " & CStr(imageCount))
...
If (dsImage.Images.Rows.Count > 0) Then
MsgBox("Delete not done, rows in datatable: " & CStr(dsImage.Images.Rows.Count), MsgBoxStyle.Information)
End If

[bapu2889]

hello sir how are you in messagebox 1st original image count = 2 2nd msgbox delete not done, rows in datatable = 2 and when i click ok it shows SqlException was unhandled "Incorrect syntax near '*' wanting for your kind rep.

[Wendelius]

Where is that SqlException coming from? After the "Delete not done..." message box there should be no code to execute (only End If). Another thing, the dataset is defined in the project, am I correct? Could you post the part that selects the images or do you create the SELECT statement?

[bapu2889]

hello again the code which exacute is as bellow

Dim imageCount As Integer = dsImage.Images.Rows.Count
MsgBox("Original image count in dataset: " & CStr(imageCount))
conImage = GetDBConnection()
commImage = New Data.SqlClient.SqlCommand("DELETE * FROM Images)", conImage)
If (dsImage.Images.Rows.Count > 0) Then
MsgBox("Delete not done, rows in datatable: " & CStr(dsImage.Images.Rows.Count), _
MsgBoxStyle.Information)

    End If

and the code where error shows

If commImage.ExecuteNonQuery() <> 1 Then (this is the line)
MsgBox("Delete failed", MsgBoxStyle.Information)
End If

this is the part to get image

Private Sub GetImage()
Dim fs As FileStream = New FileStream(mImageFilePath.ToString(), FileMode.Open)
Dim img As Byte() = New Byte(fs.Length) {}
fs.Read(img, 0, fs.Length)
fs.Close()
mImageFile = Image.FromFile(mImageFilePath.ToString())
Dim imgHeight As Integer = picImage.Height 'mImageFile.Height
Dim imgWidth As Integer = picImage.Width 'mImageFile.Width
Dim imgLength As Integer = mImageFile.PropertyItems.Length
Dim imgType As String = Path.GetExtension(mImageFilePath)
mImageFile = Nothing
' image content
Dim pic As SqlParameter = New SqlParameter("@pic", SqlDbType.Image)
pic.Value = img
commImage.Parameters.Add(pic)

    ' title
    Dim title As SqlParameter = New SqlParameter("@title", System.Data.SqlDbType.VarChar, 50)
    title.Value = txtTitle.Text.ToString()
    commImage.Parameters.Add(title)

    ' type
    Dim itype As SqlParameter = New SqlParameter("@itype", System.Data.SqlDbType.Char, 4)
    itype.Value = imgType.ToString()
    commImage.Parameters.Add(itype)

    ' height
    Dim iheight As SqlParameter = New SqlParameter("@iheight", System.Data.SqlDbType.Int)
    iheight.Value = imgHeight
    commImage.Parameters.Add(iheight)

    ' width
    Dim iwidth As SqlParameter = New SqlParameter("@iwidth", System.Data.SqlDbType.Int)
    iwidth.Value = imgWidth
    commImage.Parameters.Add(iwidth)
End Sub

this is select statment

Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
btnSave.Enabled = False
'get sql connection
Dim ImageAdd

[Wendelius]

Ok, First change the following commImage = New Data.SqlClient.SqlCommand("DELETE * FROM Images)", conImage) to commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images)", conImage) If you could then rerun the test where you had two images, what is the output now? The deletion wasn't done, because of the syntax error in SQL statement, so we don't know if the deletion works or not

[bapu2889]

hello with 2 images in database msgbox1 original row count = 2 msgobx2 delete not done , rows in datatable = 2 and then i click second msgbox it shows sql exception on this under line code it shows this error Incorrect syntax near ')'. If commImage.ExecuteNonQuery() <> 1 Then MsgBox("Delete failed", MsgBoxStyle.Information) End If

[Wendelius]

Yeah, sorry. Instead of: commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images)", conImage) write commImage = New Data.SqlClient.SqlCommand("DELETE FROM Images", conImage) There was an extra parenthesis at the end of the statement... Then let's try again