Web Forms :: Display Selected Value Of One DropDownList In Another DropDownList On Different Page

May 7, 2015

I have two pages manager and user both have drop downs as 

Week, Months and Years.

User have to enter some data week wise for each months and Manager have to approve that.

To Approve manager select months and week from dropdown on his own page and then navigate to User page.

How does I should bind the drop down so that if manager select 1st week from it's page and goes to view link of user then in drop down of user selected value shold be the same as selected by Manager on his own page.

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[Code]......

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[CODE]....

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[Code]....

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I am having a problem with disabling DropDownList based on the chice of 1st DropDownList, there is no post back occuring, and it is a template based web app here is the current code:

<script type="text/javascript">
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<script language="javascript">
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[code].....

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'Dim adapter As New SqlDataAdapter
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[Code] ....

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Set Dropdownlist Selected Value On Initial Page Load

Jul 22, 2010

I posted a similar question previously, but none of the answers worked and I've been scouring all over the web trying to find a solution. My situation, I have a Edit Window webform with a dropdownlist (Note: to avoid confusion, I'm using Telerik extensions only to decorate the webform):

<%@ Page Language="VB" CodeFile="EditFormVB.aspx.vb" Inherits="EditFormVB" %>
<%@ Register Namespace="CustomBoundField" TagPrefix="custom" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Edit Pop-up</title>
</head>
<body class="">
<form id="form1" runat="server">
<div>
<script type="text/javascript">
function CloseAndRebind(args) {
GetRadWindow().BrowserWindow.refreshGrid(args);
GetRadWindow().close();
}
function GetRadWindow() {
var oWindow = null;
if (window.radWindow) oWindow = window.radWindow; //Will work in Moz in all cases, including clasic dialog
else if (window.frameElement.radWindow) oWindow = window.frameElement.radWindow; //IE (and Moz as well)
return oWindow;
}
function CancelEdit() {
GetRadWindow().close();
}
</script>
<asp:ScriptManager ID="ScriptManager2" runat="server" />
<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" Skin="Vista" DecoratedControls="All" />
<br />
<br />
<asp:DetailsView ID="DetailsView1" DataKeyNames="ID" runat="server" AutoGenerateRows="False"
GridLines="None" DataSourceID="detailsSqlDataSource" Height="50px" Width="125px"
BorderWidth="0" CellPadding="0" CellSpacing="7">
<Fields>
<asp:BoundField DataField="TS_DESCRIPTION" HeaderText="TS_DESCRIPTION" SortExpression="TS_DESCRIPTION" />
<asp:BoundField DataField="TS_TITLE" HeaderText="TS_TITLE" SortExpression="TS_TITLE" />
<asp:CommandField ShowEditButton="True" />
<asp:CommandField ShowInsertButton="True" />
</Fields>
</asp:DetailsView>--%>
<telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" Skin="Vista" />
<br />
<br />
<asp:DetailsView ID="DetailsView1" runat="server" Height="400px" Width="745px"
AutoGenerateRows="False" DataKeyNames="TS_ID" DataSourceID="SqlDataSource2"
EnableModelValidation="True">
<Fields>
<asp:TemplateField HeaderText="Category">
<EditItemTemplate>
<%--<asp:DropDownList ID="TTCategory" runat="server" DataSourceID="ReqCategoryData" SelectedValue='<%# Bind("TS_NAME") %>' />--%>
<asp:DropDownList DataSourceID="ReqCategoryData" DataTextField="ReqCategory" DataValueField="ReqCategory"
ID="reqCategoryDropDown" runat="server" AppendDataBoundItems="true" AutoPostBack="true" >
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
<asp:CommandField ButtonType="Button" EditText="Update" ShowEditButton="True"
ShowCancelButton="True">
<ItemStyle HorizontalAlign="Center" />
</asp:CommandField>
</Fields>
</asp:DetailsView>
</div>
</form>
</body>
</html>

And in the code behind, I'm setting the datasource for the dropdownlist and using a function to query the DB for the name of the value I want to set as the selected value when the page loads initially: Partial Class EditFormVB Inherits System.Web.UI.Page

Public Shared category_Name As String = ""
Dim ddlDataSource As New SqlDataSource
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
DetailsView1.DefaultMode = DetailsViewMode.Edit
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.Page.Title = "Editing record"
''Setup DropDownList SqlDataSource
ddlDataSource.ID = "ReqCategoryData"
Page.Controls.Add(ddlDataSource)
ddlDataSource.ConnectionString = ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString
ddlDataSource.SelectCommand = "SELECT TS_NAME AS ReqCategory FROM dbo.TS_SELECTIONS WHERE (TS_FLDID = 5299 AND TS_STATUS = 0) ORDER BY TS_NAME"
Dim args As New DataSourceSelectArguments
ddlDataSource.Select(args)
''Set max length of Title field to 70 characters
Dim dvrTest As DetailsViewRowCollection = DetailsView1.Rows
Dim TitleTB As TextBox = dvrTest.Item(0).Cells(1).Controls(0)
TitleTB.Attributes.Add("onkeydown", "isMaxLen(this)")
TitleTB.Attributes.Add("maxlength", "70")
Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown")
''Perform dropdown list population operations
If Page.IsPostBack = False Then
Dim ticket_ID As String = getDataKey(DetailsView1)
''Fetch Category ID
Dim sqlText As String = "SELECT TS_REQCATEGORY FROM USR_ITFAC WHERE (TS_ID = " + ticket_ID + ") "
Dim reqDataReader As SqlDataReader = GetDataReader(sqlText)
reqDataReader.Read()
Dim category_ID As String = reqDataReader(0)
''Fetch Category name using the categoryID and set as selected value in dropdown list
sqlText = "SELECT TS_NAME FROM TS_SELECTIONS WHERE (TS_ID = " + category_ID + ") "
reqDataReader = GetDataReader(sqlText)
reqDataReader.Read()
category_Name = reqDataReader(0)
myDDL.DataBind()
myDDL.Selectedvalue = category_Name //<--this value gets set only when debugging,
End If
End Sub
Private Function GetDataReader(ByVal sqlText As String) As SqlDataReader
Dim dr As SqlDataReader
Dim sqlConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString)
sqlConn.Open()
Dim sqlCmd As SqlCommand = New SqlCommand(sqlText, sqlConn)
dr = sqlCmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection)
Return dr
End Function
End Class

The dropdownlist does get populated appropriately, however when I attempt to set the value, it doesn't reflect when the page loads; the dropdownlist just gets populated and no value is set to selected in the markup, so the first value is shown by default. The odd thing is that when I'm debugging, the value appears to get set when I step through the function, it's as if the selectedvalue is getting reset as soon as the function exits and proceeds to load the page.

SOLUTION: Had to add a separate function that is called onLoad from the DropDownList after the after Page_Load is done executing. Still unresolved is why the the DropDownList rebinds after the Page_Load.

IN HTML:
<asp:DropDownList DataSourceID="ReqCategoryData" DataTextField="ReqCategory" DataValueField="ReqCategory"
ID="reqCategoryDropDown" runat="server" AutoPostBack="true" OnLoad="DDL_DataBound">
IN CODE-BEHIND
Public Shared category_Name As String = ""
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.Page.Title = "Editing record"
''Setup DropDownList SqlDataSource
ddlDataSource.ID = "ReqCategoryData"
Page.Controls.Add(ddlDataSource)
ddlDataSource.ConnectionString = ConfigurationManager.ConnectionStrings("TTPRODReportsQuery").ConnectionString
ddlDataSource.SelectCommand = "SELECT TS_NAME AS ReqCategory FROM dbo.TS_SELECTIONS WHERE (TS_FLDID = 5299 AND TS_STATUS = 0) ORDER BY TS_NAME"
Dim args As New DataSourceSelectArguments
ddlDataSource.Select(args)
''Set max length of Title field to 70 characters
Dim dvrTest As DetailsViewRowCollection = DetailsView1.Rows
Dim TitleTB As TextBox = dvrTest.Item(0).Cells(1).Controls(0)
TitleTB.Attributes.Add("onkeydown", "isMaxLen(this)")
TitleTB.Attributes.Add("maxlength", "70")
Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown")
''Perform dropdown list population operations
If Page.IsPostBack = False Then
Dim ticket_ID As String = getDataKey(DetailsView1)
''Fetch Category ID
Dim sqlText As String = "SELECT TS_REQCATEGORY FROM USR_ITFAC WHERE (TS_ID = " + ticket_ID + ") "
Dim reqDataReader As SqlDataReader = GetDataReader(sqlText)
reqDataReader.Read()
Dim category_ID As String = reqDataReader(0)
''Fetch Category name using the categoryID and set as selected value in dropdown list
sqlText = "SELECT TS_NAME FROM TS_SELECTIONS WHERE (TS_ID = " + category_ID + ") "
reqDataReader = GetDataReader(sqlText)
reqDataReader.Read()
category_Name = reqDataReader(0)
myDDL.DataBind()
End If
End Sub
Protected Sub DDL_DataBound(ByVal sender As Object, ByVal e As System.EventArgs)
If Page.IsPostBack = False Then
Dim myDDL As DropDownList = DetailsView1.FindControl("reqCategoryDropDown")
myDDL.Items.FindByValue(category_Name).Selected = True
End If
End Sub

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Send DropDownList Selected Item Value To Another Page Using Session?

Dec 7, 2012

i am facing a problem in my code..i have one drop downlist in my page,i store the values in session ,whenever i select the name of the dropdownlist it will redirect to another page,if i select the firstvalue of the dropdownlist,it redirect to another page,and retrive the session value,in that session value i have a case in my page load,if it is firstvalue of the dropdownlist is selected it will call case 1 and executes,if the second value of the dropdownlist is selected,it will call case 2 and it executes ,its not working properly for me..here is my code

dropdownlist.aspx.vb
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
If DropDownList1.SelectedItem.Value = "" Then

[Code].....

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Forms Data Controls :: Display Records Per Page As Chosen In Dropdownlist?

May 4, 2010

I am working on displaying records in grid view. I have a dropdownlist on top of the grid and has items as 5 results per page, 10 results per page and 25 results per page. I would like to display only that many set of records per page as chosen from dropdownlist . I have tried this but don't see any change when i chose different options ..

<asp:DropDownList ID="ddlDisplayPerPage" runat="server" Height="22px"
Width="155px"
onselectedindexchanged="ddlDisplayPerPage_SelectedIndexChanged"
AutoPostBack="True">
<asp:ListItem Value="5">5 Results Per Page</asp:ListItem>
<asp:ListItem Value="10">10 Results per Page</asp:ListItem>
<asp:ListItem Value="25">25 Results per Page</asp:ListItem>
<asp:ListItem Value="50">50 Results per Page</asp:ListItem>
</asp:DropDownList>
protected void ddlDisplayPerPage_SelectedIndexChanged(object sender, EventArgs e)

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Forms Data Controls :: Dropdownlist With Request.QueryString - Display Gridview In Next Page

Jan 4, 2011

[Code]....

in my page am having one dropdownlist,Textbox and Search Button.Dropdownlist consists of Problem id,Phone No,Email,CardNo. when i select any of the above and enters a related string in textbox and click on search button a gridview will appear with related details. Everything is fine. but my challange is to display this gridview in next page.. how itz possible. i think request.Querystring helps me.but i dnt know how to write dis.Here am Pasting my code. Aspx.cs

[Code]....

Aspx code:

[Code]....

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My code but its not give expected output

protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
bind_dl1();

[Code] ....

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Dropdownlist - "Cannot Have Multiple Items Selected In A DropDownList.&quot?

Apr 29, 2010

how i handle this problem..Its in hidden filed.

Server Error in '/DentalClaimPrjt' Application.

Cannot have multiple items selected in a DropDownList.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Cannot have multiple items selected in a DropDownList.

Source Error: [Code]....

Line 85: function openPopup2(did)
Line 86: {
Line 87: var hdnClm1 = document.getElementById('<%=hdnCliamid.ClientID%>').value;
Line 88: window.location="Form.aspx?DeleteRSPid=" + did + "&Editid="+ hdnClm1;
Line 89: }

Source File: d:DentalClaimPrjtForm.aspx Line: 87 Stack Trace: [Code]....

[HttpException (0x80004005): Cannot have multiple items selected in a DropDownList.]
System.Web.UI.WebControls.DropDownList.VerifyMultiSelect() +106
System.Web.UI.WebControls.ListControl.RenderContents(HtmlTextWriter writer) +124

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Jan 15, 2010

My problem is I need to set selected value of a drop down list to a value I retreive from a database. The example only has a know value.


Below is the HTML and Code.
<asp:DropDownList
id="ddlCatogory1st1"
DataSourceID="srcCatogory1st1"
DataTextField="CategoryName"
DataValueField="CategoryID"
AutoPostBack="true"
Runat="server" />
<asp:sqldatasource id="srcCatogory1st1"
ConnectionString="server=(local);database=db;Trusted_Connection=true"
SelectCommand="SELECT CategoryID, CategoryName FROM Categories WHERE ParentCategoryID is null ORDER BY CategoryID"
Runat="server" ></asp:sqldatasource>
Sub Page_Load()
DISPLAY_CATEGORY()
End Sub
Sub DISPLAY_CATEGORY()
ddlCatogory1st1.DataBind()
ddlCatogory1st1.Items.FindByValue("A").Selected = True
End Sub

When I run this page I get

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 222:
Line 223: Sub DISPLAY_CATEGORY()
Line 224: ddlCatogory1st1.DataBind()
Line 225: ddlCatogory1st1.Items.FindByValue("A10").Selected = True
Line 226: End Sub

Even if I take out the databind I get the same error.

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drpdwncity.SelectedItem.Text = READER("CITY").ToString.Trim

i am using the above code

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Sep 10, 2010

I'm having issues getting the selecteditems and value after Databinding a dropdown list. I have a button event with dropdownlist2.Selecteditem.text, but will always get the "-- Select --" as the SelectedItem.text ?

[Code]....

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I have items in a sql table that i populate a dropdown list with.  so on page load the items are sent to dropdown list.  I have a button on the page with the dropdown list that onclick it launches another page that allows more items to be added to the database table.

What I want to do is to refresh/update the list of items in the dropdown list when the second page is closed.  In addition the last item added to the table will be the selected item in the drop down list.

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