Get the specific files from directory

Hi,

I have some some files names in SQL DATABASE but my actuall files are keep in a seperate folder. so please help me that becasue i dont know that how i can select the specific files from folder and fetch into the imageArray according to the database table. In my coding its get the all files from directory but i want to get from database with where class and then select from directory.

The structure of my table is

create table event_pic
(
event_sub_id integer,
event_pic_name varchar(50)
)

here is code below:

Sub displayMe()

dim con as new SQLConnection("server=london-home; Database=tony; uid=rashid2; pwd=test; ")
dim cmd as new SQLCommand("select * from event_pic where event_sub_id='5' ",con)

con.open()

dim SDR as SQLDataReader
SDR = cmd.ExecuteReader()



con.close()


Dim imageArray() As String
Dim i As Integer

' grab full path and file of images on server in images folder
imageArray = Directory.GetFiles(Server.MapPath("upload/"), "*.*")

' remove the full path from the image filenames
For i = 0 To (imageArray.Length - 1)
imageArray(i) = Replace(imageArray(i), Server.MapPath("upload/"), "")

Next


ViewImages.DataSource = imageArray
ViewImages.DataBind()


End Sub

If you are using 2.0 you can solve it with a List.

Sub displayMe()Dim conAs New SqlConnection("server=london-home; Database=tony; uid=rashid2; pwd=test; ")Dim cmdAs New SqlCommand("select * from event_pic where event_sub_id='5' ", con) con.Open() Dim SDR As SqlDataReader SDR = cmd.ExecuteReader() Dim imageList As New List(Of String)() While SDR.Read() imageList.Add(SDR("event_pic_name").ToString())End While ViewImages.DataSource = imageList ViewImages.DataBind() con.Close()End Sub

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but the thing is that the database table only keeps the name of images actuall images are in a seperate folder and I will trace from folder according to the sql query.

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? In your initial query you strip out the path of the image, so imageArray will only contain the actual name of the image - without path. How do you want it? Does the entries in the database contain full path? Do you want to strip the path prior to binding?

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In my first query I get the files from DIRECTORY.GETFILES and then from loop I remove the paths and then bind to datagrid. anyway just pls tell me that the script that how I can get the specific files from folder according to the sql query?

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my database entries only keep only the names of files not full path

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If all your files are placed in the same folder, you can simply prefix the path of the image with that folder name. You should not use Server.MapPath for this, as it translates to a physical path. You need a virtual path in order serve the image URL correctly to the client. Also you must make sure that the image folder is located under the web root, either physically or through a virtual directory.

To get the correct virtual path in an asp.net app, you should use Page.ResolveUrl method.

So, the updated code would be:

imageList.Add(Page.ResolveUrl("~/imagefolder/") + SDR("event_pic_name").ToString())

|||

when i declare the image list its give me this error

Dim imageList As New List(Of String)()

Error: Type 'List' is not defined.|||

imports System.Collections.Generic

(Requires .net 2.0 or higher)

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Ok, Thanks but its display no images when i set the

ViewImage.DataList = imageList

ViewImage.Databound()

<asp:DataGrid runat="server" ID="ViewImages" AutoGenerateColumns="false" >
<columns>
<asp:TemplateColumn>
<itemtemplate>
<table id="tt" border="1" cellpadding="5" cellspacing="0">
<tr>
<td width="210"><img src="http://pics.10026.com/?src=upload/<%# Container.dataItem() %>" border="0" /></td>
</tr>
</table>
</itemtemplate>
</asp:TemplateColumn>
</columns>
</asp:DataGrid>

|||

You already have the image path specified in your asp.net code. You have to choose - either you have it there, or you have it in your page class. Can't have both, or else the path will be invalid. My suggestion is that you set the entire path from your page class, with the code I provided (Page.ResolveUrl). If you do a view source on the page, you should see that the images are there but the path is invalid.

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can you explain me that how i can set this path and shows the images through datagrid, My acutall path is in the root directory and name of the folder is "upload". and i use this script to get files

do while SDR.Read()

imageList.Add(Page.ResolveUrl("~/upload/") + SDR("event_pic").ToString())

Loop

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If you want to display only the pictures, I would recommend you to use a Repeater instead, as it is more logical.

See this tutorial:http://msconline.maconstate.edu/tutorials/ASPNET20/ASPNET08/aspnet08-01.aspx

Also, see this previous post:Using a repeater to display images side by side?

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hmmmm, My problem is still remain actually i am a newly person in asp.net and so thats why i have a some problem, suppose if i use repeater but how i can display the images because my database hold only the names of images and the images are in a seperate folder. Is it possible to write a short script for me I shall be very thankful to you.

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This is another way to do it, may not be the best, but it works.

<asp:GridViewrunat="server"ID="GridView1"AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<tableid="tt"border="1"cellpadding="5"cellspacing="0">
<tr>
<tdwidth="210">
<%# GetImage(Eval("imagename").ToString()) %>
</td>
</tr>
</table>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

Then inside the codebehind

Sub DataBindPhotos()

Dim mConAsNew SqlConnection("server=london-home; Database=tony; uid=rashid2; pwd=test;")

Dim mComAsNew SqlCommand("select * from event_pic where event_sub_id='5' ", mCon)

Dim myAdapAsNew SqlDataAdapterDim myTableAsNew DataTable

myAdap.SelectCommand = mCom

myAdap.Fill(myTable)

GridView1.DataSource = myTable

GridView1.DataBind()

End Sub

Function GetImage(ByVal ImageNameAsString)AsString

Return"<img src=path/to/your/pictures/" + ImageName +" border=0 />"

EndFunction