Web Forms :: Display Image Based On Value From QueryString Parameter
Jun 30, 2013
In my asp.net+vb web with access database there is a page which displays data as per query string and the string is PNO and all data is correctly displayed in gridview and dataview. there is a Image1.ImageUrl and i used the following code but it is not working
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
Dim PNO As String
PNO = Request.QueryString("PNO")
Image1.ImageUrl = "C:/wing/Photos/" + PNO + ".jpg"
End Sub
I need to check if any rows are returned in a QueryString here's what I have so far.not sure what code to put to see if the row count is greater than 1
private void BindDataToGrid() { //MessageBoardEntities3 is ThemeableAttribute connection string name int TID = Convert.ToInt32(Request.QueryString["ThreadID"].ToString()); // if Post ID is int var context = new MessageBoardEntities3(); gvPosts.DataSource = from p in context.Posts where p.ThreadID == TID select new { p.Post1, p.PostID }; gvPosts.DataBind(); lblNoPosts.Text = "No posts found for this thread."; }
I need to set up the slide show based on a querystring parameter. I thought I had this figured out, but I clearly don't understand something about how the webservice works. I have this in the .aspx page:
My problem is there is a query string link web page in my asp.net+vb code web. When a visitor clicks in a link button the data pertaining to that person is diplayed i am willing to display the photo of the person in that page..
.vb
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Request.QueryString("PNO") IsNot Nothing Then Try ' Read the file and convert it to Byte Array Dim filePath As String = "C:AWINGPHOTOS" Dim filename As String = Request.QueryString("PNO")
I am trying to display an image from database, and I keep ending up with an error Parameter is not valid. Bitmap bm2 = new Bitmap(targetW, targetH);
I have tried different ways but I can't get it to work (as you can see in my commented code). I am having trouble on the saving it to the database process, displaying it isn't a problem (when I had valid images)
I have these 4 images along with the descriptions:
Flag Description
Green Flag (WBGTI of 80 to 84.9 degrees F): Heavy exercises, for unacclimatized personnel, will be conducted with caution and under constant supervision.
Yellow Flag (WBGTI of 85 to 87.9 degrees F): Strenuous exercises or physical labor will be curtailed for unacclimatized, newly assigned personnel in their first 3 weeks. Avoid outdoor classes or work in the sun.
Red Flag (WBGTI of 88 to 89 degrees F): All PT or very strenuous work will be curtailed for those not thoroughly acclimatized by at least 3 weeks. Personnel not thoroughly acclimatized may carry on limited activity not to exceed 6 hours per day.
Black Flag (WBGTI of 90 and above degrees F): All nonessential physical activity will be halted.
1 page to set the flag condition and another page to display the flag and the description. I am new to coding and Im not sure how to do it. I do have MSSQL Server 2005 that I can use to store the data.
I am developing a new website and I have a very strange problem. Depending on a simple query string parameter value I have "Internet Explorer cannot display the webpage" or a correct page. Let me show a couple of examples:
This url works, and displays the value passed in the "data" parameter:
http://62.22.11.221/default.aspx?data=cppexample
But this url does not work and I don't really know why:
in my asp.net+access web code in vb. There is three labels named (tata.text,tvs.text,msu.text) is there any option on clicking on the label named tata.text the data pertaining to tata be displayed in a gridview in another page or a popup display in same page.
The following code works well as long as I pass a querystring value to the datalist.
Private Sub BindGrid() Dim id As Integer = Integer.Parse(Context.Request.QueryString("id")) Dim strConnString As String = ConfigurationManager.ConnectionStrings("Conn").ConnectionString Using con As New SqlConnection(strConnString) Using cmd As New SqlCommand() cmd.CommandText = "select Id, Name from tblFiles where Id=@Id"
[Code] ......
However, the page errors with the message "Value cannot be null." if I don't pass a value. I know that DataList does not have an EmptyItem Property like a Gridview control. I do not want the page to error if I don't pass a value. Need info to deal with empty values in a datalist.
Most websites have pointed me to this code to use:
The 'list' throws an error. The error is "Too few type arguments to 'System.COllections.Generic.List". I am not sure if the code is written in C# and that is what is causing the error. It seems that it should work but I can not figure out the 'list' error.
i m displaying an image in gridview based on condition from sql table. That is if the colum named "availabillity" is A the image will be red n if the value is "NA" the image will be green. i am using RowDataBound event.
but i am getting error as "Cannot implicitly convert type 'System.Web.UI.WebControls.DataControlRowType' to 'bool'".
I am really new at this. I have a site that I would like to display a certain image (a colored flag) based on an entry in the database. I have a folder called flag_images, I'm using VB, and MSSQL Server 2005. I have never done anything like this. There are 4 images total. They are green.gif, yellow.gif, red.gif, and black.gif. The database table is called tblflag. There are three columns. ID (int), time_set (datetime), and flag_color (nvarchar).
I would like to display the green flag if the column flag_color is equal to green and so on for the other colors. Only one flag will be displayed at a time.
I have built some back-end code to retrieve an image from a SQL Server database. I want to display this image on my web form based on the currenct selected value of a gridview control.
I have a page called GetImage.aspx which takes two querystring parameters, entityId and entityType. entityId is the GridView.SelectedValue and entityType is simply "T". My code for GetImage.aspx looks like this:
[Code]....
The image is not displayed, however I can see the stored procedure being executed on the database server with the correct ID when I select an item in the GridView, so that part is working, but the display of the image isn't.
Am displaying the contents of a folder(folders n files) in a gridview.In the gridview,file/foldername ,type ,size ,Last modified date columns are displayed.the datasource for this gridview is supplied manually through a datatable.
I need to display folder/file images beside folder/filename.if the datasource is from a database we can give a if condition in the following way.
[code]....
But here in itemtemplate I am binding the data using bind expression instead of Eval .So I could not give if condition here.
How can I display folder or file image based on a condition ?the datasource is provided manually to the gridview not from a database.
I have the following VB code. On the button response.redirect, I include the Identity field IDProfilefleet. However I would also like to add the value for IDProfileTerminal. Since I am inserting this data to a SQL database and getting back the value for IDProfilefleet, how can I also include the value for IDProfileTerminal?
In my project one of scenario demands passing querystring values more than 256 chars @ a time ...I tried it but after 256 chars its trunacting all other chars. workaround or various ways for passing more than 256 chars through querystring.
