Web Forms :: Retrieve Data From Querystring Having Two Concatenated SQL Columns?
Apr 16, 2010
I have two Drop Down Lists (DDL), DDL1 & DDL2 respectively. DDL1 gets populated with "State" from a backend database where as DD2 gets populated with TWO fields "LATA" & "LATA Name" concatenated together. Here are the codes for the DDL2 :
[Code]....
The code behind the Submit button is using Querystring and directing to the next page:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Response.Redirect(String.Format("Option1_result.aspx?ddl2={0}& ddl3={1}", HttpUtility.UrlEncode(DropDownList2.SelectedValue),
HttpUtility.UrlEncode(DropDownList3.SelectedValue)))
End Sub
My problem is: How to retrieve data from a Querystring which contains data from two concatenated SQL columns? I want to selectively retrieve only the first three digits in the ddl2 Querystring which will give me the LATA number.
I have an accessdatasource with multiple columns, one column I use it to populate a dropdownlist. Can I use the data from other columns to insert into a table, insert being done in the aspx.vb page, without creating gridview etc.
Is it possible to make a detailsview one column visible= false and still be able to evaluate its contents?
I have a datagrid whose columns are autogenerated (based on the results from an SQL SELECT query). However, I need to retrieve values from certain cells across the datagrid, using the following code to step through the results.
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I need to specify all my columns using TemplateField?
I´m having a code making some txt-files out of a query for each af a dropdownlist.
I need to name the the output file to a name including the distinct data of a column in my query.
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The output file name should include the data from the query of agent_input36. It could be several data. I´m trying to make an order file. The orderfile name (.txt) should include the possible names of agent_input36. It could look like. YYY_"agent_input36"_Order_"Date"_CCC.txt. Can I retrieve the data of this column from a sqlDataAdapter into a stringvalue?
In the following code, I need to modify the Handler so that the records or results that display are based on a QueryString value. Currently all of the records in the table display on the page but I want records to display based on the passing a querystring value based on the field, id. I have tried to alter the code without much success.
Public Class FileVB : Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest Dim id As Integer = Integer.Parse(context.Request.QueryString("id")) Dim bytes As Byte() Dim contentType As String Dim strConnString As String = ConfigurationManager.ConnectionStrings("fitnesConnectionString").ConnectionString Dim name As String Using con As New SqlConnection(strConnString) Using cmd As New SqlCommand()
I should probably post this question to a different forum but I've had such good luck on this one, I hate to leave...I have an SQLDataSource which has a concatenated field of FirstName + ' " + LastName AS FullName. That datasource is used to populate a Primary Contact combobox in the GridView based on the dsOrganizations datasource. ComboBox datasource = dsContacts, TextField = FullName, ValueField = ContactID, ValueType = Int32 nfortunately, not all the Organizations have Primary Contacts listed yet so the above substitution breaks and doesn't even show the Primary Contacts when they existWhat I need is someway to either leave the Primary Contact row blank in the DataGrid or replace it with "[none selected]"
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"
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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 have a page that I want to be able to amend certain user details.
The page starts with a drop down list where I query a table that holds the first and lastname of the users from an Access database. I concatenate the results so the full name appears in the drop down.
Then the problem comes when I click on a name I need it to populate a GridView with some of the details about that user with a Select and Delete button.
Because I'm using this as a query for the drop down and combining the two values the subsequent gridview query fails to take the value.
-7vf- I write a program by c# to check and retrieve data from database
The problrm:I have one table(1), I want to make update for that table(1) that is by compare the one column in table(2) with the right side from one column in table(1), so if there is any similarity it will retrieve the data and if there is no match just it will make the record empty(null) "the data type of retrieving columns: number 'double'", but the problems is:
I try to retrieve 11 columns, 7 of them are empty .the program run with out error ,but it will retrieve some records with full data 11 columns, but some of records has only 5 columns have data and 7 columns are empty (these records when I run the program did not retrive any columns, it give me empty records!!)
this is the code : while (or.Read()) { or.GetValues(field); OdbcCommand oc2=null; [code]....
I want to retrive all data which are empty or null and all data
I created a gridview that is made up of 4 gridviews and using a stored procedure to populate it. I create columns at runtime because the number of columns changes all the time.To make the grids editable I am adding template fields at runtime as I create the columns, this is to ensure that a user is able to edit the cells and some foot values update. Reason why I have four grids is to freeze rows and columns like in excel using javascript. The problem is that performance is very bad especially in IE, the grids take a long time to load. I am not sure if this is caused by the data load or the creation of text boxes. see some of the code below for my _aspx page:
in asp.net page user able to select gridview Columns, and it will hide remaining columns and that selection done by check box with column list bellow is Image link , what exactly I am looking for [URL] it look bellow after selection of column done [URL]
I can't stand appending a concatenated string. Isn't that the purpose of using a stringbuilder? This is another developer's code and I am adding onto another part of it, but I want to change this too. Or should I just let still waters lie, as the saying goes?
I have to redefine the ListBox class to make sure that it returns a csv string of all the selected items and also should take in a csv string and populate the listbox when needed. Lets say I have this code. What are the functions that I have to override and how do I do it?
using System; using System.Web.UI.WebControls; using System.ComponentModel;[code]....
The problem is I have an autocomplete extender on my page for a search purpose. I have a webservice pulling data from my DB, a little Linq query and I am pulling data just how i want it to be displayed. But then a problem came, I would like one thing to happen to resolve this following issue. First, observe codes from my web service (it works!)
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observe After user select an item (I am getting that) 1) How do I ONLY have the string value of ' LoalArea ' in my textboxafter the user makes a selection disregarding the other ( " , " and " County " ) added string. I still would like my users to see them all ([LocalArea] + ", " [County]) in the list dropdown but not in the textbox after they selected .
Here in below code i have used querystring for sending imagename from this page to another page. Now i just want that with this imagename in also want to send span element's text with same querystring.How can i achieve this?
I'm binding a gridview from a webservice with 30 columns and 10 rows, I need to print the same in a PORTRAIT, for that i decided to display columns as rows and
I have a GridView that has several dynamic columns (I do not know how many at design time and it could be 0-12 columns, hence need for dynamic columns). I have the columns in the grid and data bound to them - works great. There are other standard, design-time TemplateField columns with TextBox controls in them. These are bound with values that the user can edit. The grid is posted back via a Submit button. My question is "Why does gv.Columns.Insert() cause all my TextBox data to be null on Postback, but gv.Columns.Add() works like a champ?"
protected void BuildColumns() { // The first column to begin to insert the columns in the GridView int columnIndex = 5; BoundField aoColumn = new BoundField(); aoColumn.HeaderText = "New Column 1"; gvMyGrid.Columns.Insert(columnIndex, aoColumn); // kills txtQuantity.Text on postback gvMyGrid.Columns.Add(aoColumn); // works fine columnIndex++; foreach (MyEntity my in _myEntityCollection) { BoundField myColumn = new BoundField(); myColumn.HeaderText = String.Format("{0:d}", my.StartDate); gvMyGrid.Columns.Insert(columnIndex, myColumn); columnIndex++; } }
I then go on to assign values to these BoundFields in the _RowDataBound method and all of this works great. However, when I post back and try to reference some TextBox and they are all null. And yes, I have the BuildColumns() call wrapped in if (!IsPostBack) on Page_Load. Of course I would like to use .Insert() so that the columns can go in the proper location and not at the end of the Columns array.
i have page that display titles of user messages when the user click the title he can read the all message. iv'e linked the title to new page using 2 id parameters (example: readMessage.aspx?userId=<%#Eval("userId")%>&messageId=<%#Eval("messageId")%>"), how can i send the 2 parameters to the new page without expose he parameters in the url section? (to avoid user to change the parameters and see other messages)
I'm trying to use the value of a QueryString as the file name for an image. I figured I could use a textbox to get a string value and then use that but I don't see how to use my Variable in the code page as a value in my .aspx page.Also, I thought there might be a way to set the value of an image control directly...I have this so far:
