Web Forms :: Check If QueryString Parameter Has Value Or It Is NULL In C#
Jun 25, 2012How to check the query string value null, if null then display the default value instead of object reference error.
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View 5 RepliesCan Check Rows Returned In A QueryString Parameter Based Entity Framework Query
May 29, 2010I 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
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Check If Output Parameter Is Null Before Binding?
Jan 26, 2011How can i check if an output parameter is null before i bind it to a asp literal, and if it is null i want to just make the literal
hname1.Text = cmd.Parameters("@hotel1").Value
hname1.DataBind()
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[code]...
Data Controls :: Populate DataList Based On QueryString Value Throws Error When QueryString Is NULL Or Blank
May 7, 2015The 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:
<FooterTemplate>
<asp:Label ID="lblEmpty" Text="No Result" runat="server"
Visible='<%#boolean.parse(([b]list[/b].Items.Count=0).ToString())%>'>
</asp:Label>
</FooterTemplate>
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.
Web Forms :: Add Parameter To Querystring Redirect VB?
Mar 20, 2010I 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?
[Code]....
Web Forms :: How To Hide A QueryString Parameter In URL
Aug 18, 2012How to hide the query string..
responce.redirect("default.aspx?id=4");
while displaying the page... i dont want expose thequery string to the user..just it shoud be like URL.....
Web Forms :: How To Convert QueryString Parameter Value To INT In C#
May 7, 2015using System;
using System.Collections.Generic;
using System.Linq;
[Code].....
I have also tried Convert.ToInt32 and int.Parse
Web Forms :: How To Extract QueryString Parameter Value From AbsoluteURI
Jan 28, 2014I have attached a ID in the email link I send using the below code
Request.Url.AbsoluteUri.Replace("CreateEvent.aspx", "AdminEdit.aspx?maxEventID=" + maxEventID)..
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MVC :: How To Use Reference Type To Change Not Null To Null Parameter
Feb 24, 2010I am using dropdownlist in my view page with some values which will display corresponding ID(primary key of other table) in my database.If i leave my dropdownlist blank and save it in database then its showing null parameter error. Can you explain how to use this reference type to overcome this error
View 2 RepliesWeb Forms :: NULL Can't Be Converted To INT.The SQL Datatype For This Querystring Is Int?
Jul 31, 2010specify a querystring to be always null when there is no value to pass?I always get an error saying NULL can't be converted to INT.The SQL datatype for this querystring is int.
View 5 RepliesWeb Forms :: Display Image Based On Value From QueryString Parameter
Jun 30, 2013In 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
Web Forms :: How To Pass A Long Parameter String (more Than 256 Chars) Via Querystring
Aug 30, 2010In 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.
View 6 RepliesWeb Forms :: Pass QueryString Parameter In PostBack URL Of LinkButton And Fetch It On Next Page
May 22, 2013In my asp.net web i used the following code:
<asp:LinkButton ID="LinkButton1" runat="server"
PostBackUrl="unitlink.aspx?coy=tata">Tata</asp:LinkButton>
The data is correctly displaying in gridview.
There is a label (label1.text) in the same page i want to display the coy in that label along with the gridview....
Forms Data Controls :: Set Querystring Parameter In Hyperlink From Selected.item.text In Dropdownlist
Jul 9, 2010I have a HyperLink control in a ListView, and I need to pass a couple of querystring parameters.
[Code]....
The first parameter is based on the current DataItem value in the LV.
Suppose I want to set a second parameter with a value from Selected.Item.Text in a DropDownList on the same page, how would the HyperLink look?
Web Forms :: Modify Xml File In Memory To Dynamically Populate Querystring - SiteMap.CurrentNode Is NULL
Dec 24, 2010I m using multiple sitemaps in my website. The providers are defined in web.config file as:
[Code]....
[Code]....
Now I m trying to modify one of my xml file in memory to dynamically populate querystring but when I use
Dim currentNode
As
SiteMapNode =
SiteMap.CurrentNode.Clone(True)
I get Null in my currentNode and I cant point to the node.
C# . Keep A Querystring Parameter In Session ?
May 26, 2010Users will get to my site using a specific parameter, e.g. :http://www.mysite.com/whatever/?keepTrackOfThisValue=fooorhttp://www.mysite.com/who/cares/?keepTrackOfThisValue=barI would like to store the value of this peculiar parameter in Session everytime I found it in the QueryString. I'm currently using the Session_Start event in Global.asax in order to store this but I would like to override the value each time the parameter value change, which is not possible my way.Where would you do this ?
View 6 RepliesHow To Pass More Than One Parameter In Querystring
May 7, 2015I have one hyperlink I want to pass more than one parameter in hyperlink
but cant pass perfect data in query string
using database.
same data pass in another page using this code.
<asp:HyperLinkField DataNavigateUrlFields="Product_Id" Target="_blank" DataNavigateUrlFormatString="AddprodPhoto.aspx?Product_Id={0}&Catalog_Id={0}" Text="Upload">
o/p
[URL] ....
product_id pass right Catalog_Id=2 is wrong
ADO.NET :: Linq To Sql When Querystring Is Null?
Mar 24, 2011next code works with no problem at all but, isn't there a more elegant way?
What I want is to show all records when querystring is null and only those
who match the criteria when querystring is not null.
[Code]....
How To Check If A URL Contains A QueryString
Apr 30, 2010The first time the user navigates to my page there will be no query string in the url.
The page will display them 10 posts, and at the bottom there will be a 'next page' button that will call the same page but this time pass the page a pageNumber in a query string and the next ten posts will be displayed.
how can I detect if there is a QueryString in the url so that only when the page is called by the 'next page' button and there is a QueryString is my code exicuted?
Web Forms :: Value Cannot Be Null.Parameter Name Input Error
Mar 3, 2010for some reason i get an error saying the following. i have tried to look it up on google but there seems to be nothing about this error.
View 2 RepliesWeb Forms :: Check If Parameter Exist?
Mar 25, 2011i need to check if some parameter exist in Request.Params any one know how to check that? dont use request.params["para"] != or "" i am not try to check if value exist, i need to check if the parameter himself exist before the checking if his not null or empty.
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Sep 27, 2010I do not know that How to hide the querystring parameter from url in asp.net
View 5 RepliesDefine QueryString Parameter In Dynamic Data
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Edit.aspx?AccountID=1
I want to use something like this
Edit.aspx?id=1
C# - Basing .NET Outputcache On Querystring Parameter AND Sesion?
Mar 3, 2010I would like to know if its possible to use outputcache with a querystring parameter AND a session parameter together.I'm serving location based content and the countryid is stored in a session, while other parameters as categoryid, pageindex are stored in querystring.
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