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Duplicate id error

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Wizard

This is a migrated thread and some comments may be shown as answers.

Hamid asked on 30 Jul 2015, 12:30 PM

The following is my code.

<telerik:RadWizard runat="server" ID="RadWizard1" OnWizardStepCreated="RadWizard1_WizardStepCreated">

<WizardSteps>

<telerik:RadWizardStep ID="rwsStart" Title="شروع" StepType="Start">

</telerik:RadWizardStep>

<telerik:RadWizardStep ID="rwsEnd" Title="پایان" StepType="Finish">

</telerik:RadWizardStep>

</WizardSteps>

<Localization Next="بعدی" Cancel="انصراف" Finish="پایان" Previous="قبلی" />

</telerik:RadWizard>

<asp:Timer ID="Timer1" runat="server" Interval="10000" OnTick="Timer1_Tick" Enabled="True">

</asp:Timer>

When the timer post back page. There is an error to say:

Multiple controls with the same ID 'rwsEnd' were found. FindControl requires that controls have unique IDs.

13 Answers, 1 is accepted

answered on 31 Jul 2015, 08:18 AM

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

var myData = new DataAccess();

myData.TesMasterIdFk = MasterId;

myData.TesId = TestId;

DataRow tRow = myData.TestDetailsReturn();

lblTime.Text = tRow["TesTotalTimeLabel"].ToString();

DataTable qTbl = new DataTable();

myData.QueTestIdFk = TestId;

myData.QueMasterIdFk = MasterId;

qTbl = myData.QuestionsOfTestReturn();

foreach (DataRow myRow in qTbl.Rows)

{

RadWizardStep step = new RadWizardStep();

step.ID = "Q" + myRow["QueId"];

step.Title = myRow["QueTitle"].ToString();

RadWizard1.WizardSteps.AddAt(1, step);

}

public void Timer1_Tick(object sender, EventArgs e)

{

RadWizard1.ActiveStepIndex = RadWizard1.WizardSteps.Count-1;

RadWizard1.Enabled = false;

}

protected void RadWizard1_WizardStepCreated(object sender, WizardStepCreatedEventArgs e)

{

var myData = new DataAccess();

DataTable qTbl = new DataTable();

myData.QueTestIdFk = TestId;

myData.QueMasterIdFk = MasterId;

qTbl = myData.QuestionsOfTestReturn();

foreach (DataRow myRow in qTbl.Rows)

{

if (e.RadWizardStep.ID == "Q" + myRow["QueId"])

{

Panel myPan = new Panel();

myPan.CssClass = "tCss";

//Add Label

Label label = new Label();

label.Text = myRow["QueTitle"].ToString();

label.CssClass = "testLabel";

myPan.Controls.Add(label);

myData.ChoMasterIdFk = MasterId;

myData.ChoTestIdFk = TestId;

myData.ChoQuestionIdFk = Convert.ToInt64(myRow["QueId"].ToString());

var choTbl = new DataTable();

choTbl = myData.ChoisesOfQuestionReturn();

foreach (DataRow myChoises in choTbl.Rows)

{

//Add Choises

RadioButton radioBut = new RadioButton();

radioBut.Text = myChoises["ChoTitle"].ToString();

myPan.Controls.Add(radioBut);

}

e.RadWizardStep.Controls.Add(myPan);

}

answered on 04 Aug 2015, 06:13 AM

testTimer.zip

Hello,

I have tested the same scenario in an isolated page but it worked correctly at my side. I am attaching my test page. Please review it and let me know what else to add in order to observe the same error.

Regards,
Plamen
Telerik

answered on 17 Aug 2015, 03:20 PM

This is my project. Please tell me what's problem and it's solution.

Thanks.

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

<style type="text/css">

.lblCss {

display: block;

}

.panCss {

font-family: tahoma;

}

</style>

</head>

<body>

<form id="form1" runat="server">

<telerik:radscriptmanager ID="RadScriptManager1" runat="server"></telerik:radscriptmanager>

<div>

<telerik:radwizard runat="server" ID="RadWizard1" OnWizardStepCreated="RadWizard1_WizardStepCreated">

<WizardSteps>

<telerik:RadWizardStep ID="rwsStart" Title="Start" StepType="Start">

</telerik:RadWizardStep>

<telerik:RadWizardStep ID="rwsEnd" Title="Finish" StepType="Finish">

</telerik:RadWizardStep>

</WizardSteps>

</telerik:radwizard>

</div>

<asp:Timer ID="Timer1" runat="server" Interval="10000" OnTick="Timer1_Tick" Enabled="True">

</asp:Timer>

</form>

</body>

</html>

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

GetQuestionTable();

GetChoicesTable();

CreateSteps();

}

protected void RadWizard1_WizardStepCreated(object sender, WizardStepCreatedEventArgs e)

{

DataTable tblQuestions = new DataTable();

tblQuestions = GetQuestionTable();

foreach (DataRow qRow in tblQuestions.Rows)

{

if (e.RadWizardStep.ID == "Q" + qRow["id"])

{

Panel containerPan = new Panel();

containerPan.CssClass = "panCss";

//Add Label

Label label = new Label();

label.Text = qRow["title"].ToString();

label.CssClass = "lblCss";

containerPan.Controls.Add(label);

var tblCoices = new DataTable();

tblCoices = GetChoicesTable();

DataRow[] tbl =tblCoices.Select("questionIdFk=" + qRow["id"]);

foreach (DataRow myChoises in tbl)

{

//Add Choises

RadioButton radioBut = new RadioButton();

radioBut.ID = "Ch" + myChoises["id"];

radioBut.Text = myChoises["title"].ToString();

radioBut.AutoPostBack = true;

radioBut.GroupName = Guid.NewGuid().ToString();

//radioBut.CheckedChanged += radioButtons_CheckedChanged;

containerPan.Controls.Add(radioBut);

}

e.RadWizardStep.Controls.Add(containerPan);

}

public void Timer1_Tick(object sender, EventArgs e)

{

RadWizard1.ActiveStepIndex = RadWizard1.WizardSteps.Count - 1;

RadWizard1.Enabled = false;

}

private DataTable GetQuestionTable()

{

//Creating Question Table

var tblQuestions = new DataTable();

tblQuestions.Columns.Add("id");

tblQuestions.Columns.Add("title");

for (int i = 0; i < 10; i++)

{

DataRow questionRow = tblQuestions.NewRow();

questionRow["id"] = i;

questionRow["title"] = "Question " + i;

tblQuestions.Rows.Add(questionRow);

}

return tblQuestions;

}

private DataTable GetChoicesTable()

{

//Creating Choices Table

var tblChoices = new DataTable();

tblChoices.Columns.Add("id");

tblChoices.Columns.Add("title");

tblChoices.Columns.Add("questionIdFk");

int k = 1;

for (int i = 0; i < 10; i++)

{

for (int j = 0; j < 4; j++)

{

DataRow rowChoices = tblChoices.NewRow();

rowChoices["id"] = k;

rowChoices["title"] = "Choice Number: "+ (j+1);

rowChoices["questionIdFk"] = i;

tblChoices.Rows.Add(rowChoices);

k++;

}

return tblChoices;

}

private void CreateSteps()

{

//Creating Steps of Wizard

var tblQuestions = new DataTable();

tblQuestions = GetQuestionTable();

foreach (DataRow qRow in tblQuestions.Rows)

{

RadWizardStep step = new RadWizardStep();

step.ID = "Q" + qRow["id"];

step.Title = qRow["title"].ToString();

RadWizard1.WizardSteps.AddAt(1, step);

}

answered on 25 Aug 2015, 08:26 AM

Hello,

I have inspected code that you provided and noticed that the issue is caused by the fact that you ahve added two of the steps from the mark up.

In cases when the steps are going to be added and removed we recommend adding all the steps from the code behind. Here instead of mixing mark up and code behind. here is the code that worked correctly at my side:

private void CreateSteps()

{

RadWizardStep stepStart = new RadWizardStep();

stepStart.ID = "rwsStart";

RadWizard1.WizardSteps.AddAt(0, stepStart);

//Creating Steps of Wizard

var tblQuestions = new DataTable();

tblQuestions = GetQuestionTable();

foreach (DataRow qRow in tblQuestions.Rows)

{

RadWizardStep step = new RadWizardStep();

step.ID = "Q" + qRow["id"];

step.Title = qRow["title"].ToString();

RadWizard1.WizardSteps.AddAt(1, step);

}

RadWizardStep stepEnd = new RadWizardStep();

stepEnd.ID = "rwsEnd";

RadWizard1.WizardSteps.AddAt(RadWizard1.WizardSteps.Count, stepEnd);

}

<telerik:RadWizard runat="server" ID="RadWizard1" OnWizardStepCreated="RadWizard1_WizardStepCreated">

</telerik:RadWizard>

Hope this will help you solve the issue.

Regards,
Plamen
Telerik