Web Forms :: How To Use A QueryString To Set A Value On Insert In A ListBox
Mar 4, 2010
I am currently attempting to set a default value on an INSERT of a ListBox to a QueryString value. I am able to do this successfully in a DetailsView, however, it doesn't seem to work for a ListBox. Here is my code:
<InsertItemTemplate>
<asp:TextBox
ID="TextBox1"
runat="server"
value='<%# Request.QueryString["Item_ID"] %>'
Text='<%# Bind("Item_ID") %>'></asp:TextBox>
The syntax is accepted, however, when in insert mode, the value is not populated.
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Sep 24, 2010
I have a listbox which populated from using a datatable. I have a Add button in my page. On clicking the add button I want to insert a blank row in the listbox. This can be done easily by
ListBox_Admin.Items.Add("");
after this is done I want to select this item as in setfocus on this item.How do I do this.
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Jan 18, 2011
I'm trying to populate 1000 ListItems in a ListBox.
how to do it. Currently only 100 items are being displayed even though I set the capacity of the ListBox to 1000.
Below is sort of how my code looks like. :)
listBox.Items.Capacity = 1000;
foreach(entity ent in enitityCollection)
{
ListItem listItem = new ListItem();
listItem.Value = ent.Id.ToString();
listItem.Text = ent.Name;
listBox.Items.Add(listItem);
}
entityCollection has 989 records in it.
Code does not generate any error. only that at the end of the loop I only get 100 items mapped to my ListBox.
Is this how the ListBox is designed for?
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May 7, 2015
if (!String.IsNullOrEmpty(hospitallist))
{
//If TextBox is not empty pass value.
cmd.Parameters.Add(new SqlParameter("@Hospital_list ", SqlDbType.VarChar, 2000));
}
else
[Code] .....
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May 8, 2010
I have two ListBoxes. I can move items from one list box to the other. I have an Insertcommand for inserting added values from the "ActivePrograms" list box to a db.
my problem is that it inserts only one item when sometimes the user added multiple items.
how do I insert all existing items from "ActivePrograms" list box?:
second issue: how do I make sure the insert command go through the list of items in the listbox and makes sure these rows does mot already exsited in the db? in other words insert only NEW values for that 'Id' value
[Code]....
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Jan 6, 2011
How can I insert an empty value in my dropdownlistbox and have it as a default? I tried .Items.Insert(0, new ListItem("", ""); and it does not work.
[Code]....
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Feb 17, 2011
I have a listbox inside a formview in a details page(master/details). The values for the listbox will come from a lookup table and when the user select one or more values it should be inserted in a table. The process sould be like the following:
The user will select one or multiple values and click on a Select button. Then a label should show the selected values. Then the user will click on the Insert button in the formview to insert it in the database.
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Apr 2, 2010
I have a page with a gridview that is populated depending upon the value of the querystring passed to it - there is a one-to-many relationship between Jobs and Locations respectively (one job can have many locations), and the gridview is a list of Locations that are associated with a particular Job. So far so good.
I have a DetailsView below whose DefaultMode is Insert to add a new location, though I can't seem to capture the JobId (guid) from the querystring. I've tried the following code on the Datasource's Inserting event:
[Code]....
but on both occasions I get the same error: Foreign Key constraint broken on JobId field. It seems that the querystring is not being passed to the datasource for inclusion in the insert.
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Apr 23, 2010
I have an SQLSiteMapProvider that needs a unique URL and have not got the smarts to work out how to get the provider to do the work so for now I thought I would just add the data to the DB then edit the URL with the ID. I can't do this on the first insert as I do not know the ID as it is an auto generated Primary Key
I tried to us the PostBackURL to go to a 2nd Page that got the New ID and added it to the end of the already known URL "Page.aspx?ID=" but apparently you can't do that as I found out (This would have been a masive hack to the problem I know but it would have got around it issue of for now)
this is how I guessed it would work
Insert Data with URL "Page.aspx?ID=" and more data.... Then Get New ID and update URL to have the ID on the end ie: Page.aspx?ID=99
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Mar 31, 2011
Im working with the following example and it works fine; i was wondering how to add / save data to another field at the same time:
I would like to add data to ImageID and PageID when the button is clicked... I can't seem to get the selectedvalue of the PageID from the dropdownlist..
Private Function GetConnectionString() As String
System.Configuration.ConfigurationManager.ConnectionStrings("ConnectionString2").ConnectionString
End Function
Private Sub InsertRecords(sc As StringCollection)
Dim conn As New SqlConnection(GetConnectionString())
Dim sb As New StringBuilder(String.Empty)
For Each item As String In sc
Const sqlStatement As String = "INSERT INTO Display_Logo (ImageID) VALUES"
sb.AppendFormat("{0}('{1}'); ", sqlStatement, item)
Next
Try
conn.Open()
Dim cmd As New SqlCommand(sb.ToString(), conn)
cmd.CommandType = CommandType.Text
cmd.ExecuteNonQuery()
Page.ClientScript.RegisterClientScriptBlock(GetType(Page), "Script", "alert('Records Successfuly Saved!');", True)
Catch ex As System.Data.SqlClient.SqlException
Dim msg As String = "Insert Error:"
msg += ex.Message
Throw New Exception(msg)
Finally
conn.Close()
End Try
End Sub
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Dim sc As New StringCollection()
For Each item As ListItem In ListBox1.Items
If item.Selected Then
sc.Add(item.Text)
End If
Next
InsertRecords(sc)
End Sub
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Nov 11, 2010
New at SQL and ASP.NET C#, bear with me. I have a form to insert into mulitple tables of a sql db. The form includes two listbox's, categoryIDlistbox and subcategoryIDlistbox, both with the ability to select multiple choices. Idea is that there is one record for the user created (Table1) and then that user can have multiple categories and subcategories assign to him/her in Table2
Table1:
userID
fname
lname
etc...
Table2
userID
categoryID
subcategoryID
If I understand correctly I need to use an array to take the multiple listbox items and save them to the tables. Not sure where the array goes in my code behind page to process the listbox and loop for muliplte selections. Here's my current code behind, where do I place the listbox array?
[Code]....
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Dec 15, 2010
I am inserting mortgage loan scenarios in via GridView table. Let's say $100K loan with FICO score 700 in state of MN.
Sometimes I want to apply the same scenario to multiple states rather than Inserting one row at a time. I figured a Listbox with SelectionMode="Multiple" option would be to way to go.
Here is some code snippets:
[Code]....
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Aug 30, 2010
How can i use querystring for this-
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?
[Code]....
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May 7, 2015
i am devalope one webpage it contain one textbox and two listboxes in that user can enter textbox value and select multipule selected values fromlistbox in that how to store database values into one record (i.e database contain 3cloumns in that store in column1:20(textbox value) and clomun2:4,3,5(selected listbox values ) and column3:4,5(selected listbox values)).in that i am using wcf service for inserting method how to pass multipule selected values into services in c
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Mar 26, 2011
I am designing a program that will let me enter the name of an item to swap and adds the swap to an array list when a button Add is pressed. Once the item is added to the array list a Sub Procedure should be called which displays the contents of the array list in a list box.
The system will also allow me to remove items from the array list using a Remove button
followed by updating array list.
I have done some part which puts item into the listbox1 which i named lstSwapList.I would need some assistance on the Sub Procedure to display the Value or Description on the other listbox2 which i have also named lstContent,if a value is selected from the listbox1.
I would also want to know how to update the Listbox content,However i hv added a sample of the way i guess it may be.
Any complete solution from anybody on the Sub Procedure and the Update Swap procedure will be greately appreciated.
The script below is what i have done so far.
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub lstContent_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstContent.SelectedIndexChanged
End Sub
Protected Sub lstSwapList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstSwapList.SelectedIndexChanged
End Sub
Protected Sub btnAddSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddSwap.Click
Dim SwapValue As String = "Sixty Pounds"
Dim Counter As Integer = 8
Dim SwapN0 As Integer
lstSwapList.Items.Add(SwapValue)
lstSwapList.Items.Add(Counter)
lstSwapList.Items.Add(New ListItem("300", "1"))
lstSwapList.Items.Add(New ListItem("ASP.Net", "2"))
lstSwapList.Items.Add(New ListItem("Programming", "3"))
SwapN0 = lstSwapList.SelectedValue
For Counter = 0 To -1
SwapN0 = lstContent.Items.Count
Next
End Sub
Protected Sub btnDeleteSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDeleteSwap.Click
lstSwapList.Items.Remove(lstSwapList.SelectedValue)
End Sub
Protected Sub btnUpdateSwap_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdateSwap.Click
End Sub
End Class
=======================================
Sub UpdateSwap(ByVal valueA As String, ByVal ValueBAs String, ByVal ValueC As Integer, ByVal ValueD As Date)
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Mar 4, 2010
I have two list boxes, one has a list of available users (about 1500 items) and the other is blank. There is a button to add the seleted items from the first list box to the second one. Both of these listboxes are within an update panel and for some reason it takes over 20 seconds for the items to show up in the second listbox.
Is this normal? Is there an alternate, faster way of doing this?
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May 7, 2015
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:
<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.
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Aug 3, 2010
All i did is added an existing webform from vs 2003 project to vs 2008. with Listbox1 control this error is appearing. value of type system.web.ui.webcontrols.listbox cannot be converted to "myprojectname.listbox"
i also have the control defined on the top: Protected WithEvents Listbox1 As System.Web.UI.WebControls.ListBox I have converted lot of pages which were used in vs 2003 to vs 2008 without any problem, also tried to right click teh webform and go to code gen file , but the file is not coming up.
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Feb 22, 2011
I'm trying to auto-populate a listbox of zip codes from a database table state_zipcode_plans based on the state a user selects from the previous listbox. I'm getting the error: Must declare the scalar variable @state_code.
[code]....
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Dec 19, 2010
I have been trying to figure out how to use <asp:requiredfieldvalidator> with ValidationExpression but am having a difficult time understanding the syntax of ValidationExpression. I'd like to make sure one textbox's number (1-12) is equal to or higher than the other textbox's (1-12) number. How is this accomplished and what's the syntax of ValidationExpression (hopefully I'm stating the question correctly).
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Mar 14, 2011
how I can read the selected field from the listbox?I have MSAccess table attached to the app.I can get to the properties, but I don't know which property gets me the data of the specific field.In VB it would be "listbox1.Column(x)", where 'x' represents the column number in the listbox1.I am using Microsoft Visual Web Developer 2010 Express
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Jan 2, 2011
So i am trying to left aligh with a listbox.I'm almost there but the problem is that i have a gap after the listbox ends.
"fill the gap" I would like the red color to start right after the listbox.
Code:
[code]....
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Mar 5, 2010
I'm intermittently seeing this exception being thrown:
A potentially dangerous Request.QueryString value detected
However when I look in the IIS logs I can see that the request that failed has no querystring logged against it.
How could this be? Are "dangerous" query strings being stripped from the log or something?
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Apr 24, 2010
Encrypt request.querystring and Descrpt request.querystring
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Jan 21, 2011
I use GridView & FormView to update a record. but when I click the "save" button, throw an except : FormView must be in the insert mode to insert a record. The record has been updated success, and I didn't change the mode of the FormView, how this error comes?
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