ReportViewerBase

// Navigate to a desired page
private void button2_Click(object sender, System.EventArgs e)
{
    var desiredPage = 5;

    // Check if the viewer can navigate to the page since the report may have fewer pages for example
    if (this.reportViewer1.CanMoveToPage(desiredPage))
    {
        // By setting the property the viewer will automatically navigate to the page in question
        this.reportViewer1.CurrentPage = desiredPage;
    }
}

' Navigate to a desired page
Private Sub button2_Click(sender As Object, e As System.EventArgs)
    Dim desiredPage = 5


    ' Check if the viewer can navigate to the page since the report may have fewer pages for example

    If Me.ReportViewer1.CanMoveToPage(desiredPage) Then

        ' By setting the property the viewer will automatically navigate to the page in question

        Me.ReportViewer1.CurrentPage = desiredPage
    End If
End Sub 

' Toggle the document map
Private Sub button9_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.DocumentMapVisible = Not Me.ReportViewer1.DocumentMapVisible
End Sub 

// Toggle the document map
private void button9_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.DocumentMapVisible = !this.reportViewer1.DocumentMapVisible;
}

// Navigate to the previous report in the history if available
private void button7_Click(object sender, System.EventArgs e)
{
    if (this.reportViewer1.NavigateBackEnabled)
    {
        this.reportViewer1.NavigateBack();
    }
}

' Navigate to the previous report in the history if available
Private Sub button7_Click(sender As Object, e As System.EventArgs)
    If Me.ReportViewer1.NavigateBackEnabled Then
        Me.ReportViewer1.NavigateBack()
    End If
End Sub 

// Navigate to the next report in the history if available
private void button8_Click(object sender, System.EventArgs e)
{
    if (this.reportViewer1.NavigateBackEnabled)
    {
        this.reportViewer1.NavigateBack();
    }
}

' Navigate to the next report in the history if available
Private Sub button8_Click(sender As Object, e As System.EventArgs)
    If Me.ReportViewer1.NavigateBackEnabled Then
        Me.ReportViewer1.NavigateBack()
    End If
End Sub 

' Toggle the parameters area
Private Sub button10_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ParametersAreaVisible = Not Me.ReportViewer1.ParametersAreaVisible
End Sub 

// Toggle the parameters area
private void button10_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.ParametersAreaVisible = !this.reportViewer1.ParametersAreaVisible;
}

private void SetEmbeddedReportEngineConnection(object sender, System.EventArgs e)
{
    this.reportViewer1.ReportEngineConnection = new Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString;
    //if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedConnectionInfo by default. 
}

Private Sub SetEmbeddedReportEngineConnection(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ReportEngineConnection = New Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString

    'if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedReportEngineConnectionInfo by default.

End Sub 

private void SetReportServerReportEngineConnection(object sender, System.EventArgs e)
{
    this.reportViewer1.ReportEngineConnection = new Telerik.ReportViewer.Common.ReportServerConnectionInfo("http://reportserver:83", "user", "pass", 20).ConnectionString;
}

Private Sub SetEmbeddedReportEngineConnection(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ReportEngineConnection = New Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString

    'if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedReportEngineConnectionInfo by default.

End Sub 

private void SetRestServiceReportEngineConnection(object sender, System.EventArgs e)
{
    this.reportViewer1.ReportEngineConnection = new Telerik.ReportViewer.Common.RestServiceConnectionInfo("http://servicehost:83/api/reports", "authToken", 20).ConnectionString;
}

Private Sub SetEmbeddedReportEngineConnection(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ReportEngineConnection = New Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString

    'if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedReportEngineConnectionInfo by default.

End Sub 

' Go to the middle of the report
Private Sub button11_Click(sender As Object, e As System.EventArgs)
    Dim middlePage = Me.ReportViewer1.TotalPages / 2
    Me.ReportViewer1.CurrentPage = middlePage
End Sub 

// Go to the middle of the report
private void button11_Click(object sender, System.EventArgs e)
{
    var middlePage = this.reportViewer1.TotalPages / 2;
    this.reportViewer1.CurrentPage = middlePage;
}

' Switch to interactive mode
Private Sub button12_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ViewMode = Telerik.ReportViewer.WinForms.ViewMode.Interactive
End Sub 

// Switch to interactive mode
private void button12_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.ViewMode = Telerik.ReportViewer.WinForms.ViewMode.Interactive;
}

' Set the zoom mode to PageWidth
Private Sub button14_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ZoomMode = Telerik.ReportViewer.WinForms.ZoomMode.PageWidth
End Sub 

// Set the zoom mode to PageWidth
private void button14_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.ZoomMode = Telerik.ReportViewer.WinForms.ZoomMode.PageWidth;
}

' Set the zoom percent to a specific value
Private Sub button13_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ZoomMode = Telerik.ReportViewer.WinForms.ZoomMode.Percent
    Me.ReportViewer1.ZoomPercent = 140
End Sub 

// Set the zoom percent to a specific value
private void button13_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.ZoomMode = Telerik.ReportViewer.WinForms.ZoomMode.Percent;
    this.reportViewer1.ZoomPercent = 140;
}

// Stop rendering the report. 
private void button1_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.CancelRendering();
}

' Stop rendering the report. 
Private Sub button1_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.CancelRendering()
End Sub 

// Navigate to a desired page
private void button2_Click(object sender, System.EventArgs e)
{
    var desiredPage = 5;

    // Check if the viewer can navigate to the page since the report may have fewer pages for example
    if (this.reportViewer1.CanMoveToPage(desiredPage))
    {
        // By setting the property the viewer will automatically navigate to the page in question
        this.reportViewer1.CurrentPage = desiredPage;
    }
}

' Navigate to a desired page
Private Sub button2_Click(sender As Object, e As System.EventArgs)
    Dim desiredPage = 5


    ' Check if the viewer can navigate to the page since the report may have fewer pages for example

    If Me.ReportViewer1.CanMoveToPage(desiredPage) Then

        ' By setting the property the viewer will automatically navigate to the page in question

        Me.ReportViewer1.CurrentPage = desiredPage
    End If
End Sub 

// Opens the dialog to export the report
private void button5_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.ExportReport("PDF", null);
}

' Opens the dialog to export the report
Private Sub button5_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ExportReport("PDF", Nothing)
End Sub 

// Navigate to the previous report in the history if available
private void button7_Click(object sender, System.EventArgs e)
{
    if (this.reportViewer1.NavigateBackEnabled)
    {
        this.reportViewer1.NavigateBack();
    }
}

' Navigate to the previous report in the history if available
Private Sub button7_Click(sender As Object, e As System.EventArgs)
    If Me.ReportViewer1.NavigateBackEnabled Then
        Me.ReportViewer1.NavigateBack()
    End If
End Sub 

// Navigate to the next report in the history if available
private void button8_Click(object sender, System.EventArgs e)
{
    if (this.reportViewer1.NavigateBackEnabled)
    {
        this.reportViewer1.NavigateBack();
    }
}

' Navigate to the next report in the history if available
Private Sub button8_Click(sender As Object, e As System.EventArgs)
    If Me.ReportViewer1.NavigateBackEnabled Then
        Me.ReportViewer1.NavigateBack()
    End If
End Sub 

// Opens the dialog to print the report
private void button4_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.PrintReport();
}

' Opens the dialog to print the report
Private Sub button4_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.PrintReport()
End Sub 

// Refresh the report with the current parameters
private void button6_Click(object sender, System.EventArgs e)
{
    this.reportViewer1.RefreshReport();
}

' Refresh the report with the current parameters
Private Sub button6_Click(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.RefreshReport()
End Sub 

void reportViewer1_Error(object sender, Telerik.Reporting.ErrorEventArgs args)
{
    if (args.Exception is System.Exception) // check for a specific exception
    {
        var message = args.Exception.Message;
        // do something with the message and/or the 
    }
}

Private Sub reportViewer1_Error(sender As Object, args As Telerik.Reporting.ErrorEventArgs)
    If TypeOf args.Exception Is System.Exception Then

        ' check for a specific exception


        ' do something with the message and/or the 

        Dim message = args.Exception.Message
    End If
End Sub 

void reportViewer1_ExportBegin(object sender, Telerik.ReportViewer.Common.ExportBeginEventArgs args)
{
    if (true) // some logic here
    {
        // Cancel is false by default
        args.Cancel = true;
    }

    switch (args.Format)
    {
        case "Excel":
            // do something
            break;
        case "PDF":
            // do something
            break;
    }
}

Private Sub reportViewer1_ExportBegin(sender As Object, args As Telerik.ReportViewer.Common.ExportBeginEventArgs)
    If True Then

        ' some logic here


        ' Cancel is false by default

        args.Cancel = True
    End If

    Select Case args.Format
        Case "Excel"

            ' do something

            Exit Select
        Case "PDF"

            ' do something

            Exit Select
    End Select
End Sub 

void reportViewer1_ExportEnd(object sender, Telerik.ReportViewer.Common.ExportEndEventArgs args)
{
    if (null != args.Exception)
    {
        //some logic if report processing is not successful
    }
    else
    {
        //suppress the viewer SaveFileDialog and use your own
        args.Handled = true;
        var fileName = args.DocumentName;
        var extension = args.DocumentExtension;
        var filter = string.Format("{0} (*.{1})|*.{1}|All Files (*.*)|*.*",
                                    fileName,
                                    extension);

        var saveFileDlg = new SaveFileDialog
        {
            Filter = filter,
            FileName = fileName + "." + extension,
        };

        if (saveFileDlg.ShowDialog() == DialogResult.OK)
        {
            try
            {
                using (var fs = new FileStream(saveFileDlg.FileName, FileMode.Create))
                {
                    fs.Write(args.DocumentBytes, 0, args.DocumentBytes.Length);
                }

                //Optionally open the file
                if (!string.IsNullOrEmpty(saveFileDlg.FileName))
                {
                    System.Diagnostics.Process.Start(saveFileDlg.FileName);
                }
            }
            catch (Exception)
            {
                //Handle exception
            }
        }
    }
}

Private Sub reportViewer1_ExportEnd(sender As Object, args As Telerik.ReportViewer.Common.ExportEndEventArgs)

    'some logic if report processing is not successful

    If args.Exception IsNot Nothing Then
    Else

        'suppress the viewer SaveFileDialog and use your own

        args.Handled = True
        Dim fileName = args.DocumentName
        Dim extension = args.DocumentExtension
        Dim filter = String.Format("{0} (*.{1})|*.{1}|All Files (*.*)|*.*", fileName, extension)

        Dim saveFileDlg = New SaveFileDialog() With { _
            .Filter = filter, _
            .FileName = fileName + "." + extension _
        }

        If saveFileDlg.ShowDialog() = DialogResult.OK Then
            Try
                Using fs = New FileStream(saveFileDlg.FileName, FileMode.Create)
                    fs.Write(args.DocumentBytes, 0, args.DocumentBytes.Length)
                End Using


                'Optionally open the file

                If Not String.IsNullOrEmpty(saveFileDlg.FileName) Then
                    System.Diagnostics.Process.Start(saveFileDlg.FileName)
                End If

                'Handle exception

            Catch generatedExceptionName As Exception
            End Try
        End If
    End If
End Sub 

void reportViewer1_InteractiveActionEnter(object sender, Telerik.ReportViewer.Common.InteractiveActionEventArgs args)
{
    var strB = new System.Text.StringBuilder();
    strB.AppendLine("You have just entered an action area.");
    strB.AppendLine("Action type: " + args.Action.GetType().Name);
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName);
    strB.AppendLine(string.Format("Mouse cursor position: {0}; Item bounds: {1}", args.CursorPos, args.Bounds));

    Console.Out.WriteLine(strB.ToString());
}

' Handles the InteractiveActionEnter event

' Do not forget to add the WithEvents clause on ReportViewer1 instantiation if needed.
Private Sub reportViewer1_InteractiveActionEnter(sender As Object, args As Telerik.ReportViewer.Common.InteractiveActionEventArgs) Handles ReportViewer1.InteractiveActionEnter

    Dim strB = New System.Text.StringBuilder()
    strB.AppendLine("You have just entered an action area.")
    strB.AppendLine("Action type: " + args.Action.[GetType]().Name)
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName)
    strB.AppendLine(String.Format("Mouse cursor position: {0}; Item bounds: {1}", args.CursorPos, args.Bounds))

    Console.Out.WriteLine(strB.ToString())
End Sub 

void reportViewer1_CustomInteractiveActionExecuting(object sender, Telerik.ReportViewer.Common.InteractiveActionCancelEventArgs args)
{
    var strB = new System.Text.StringBuilder();
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName);

    var customAction = args.Action as Telerik.Reporting.Processing.CustomAction;
    if (null != customAction)
    {
        foreach (var p in customAction.Parameters)
        {
            strB.AppendLine(string.Format("Parameter \"{0}\" value: {1}", p.Key, p.Value));
        }
    }

    strB.AppendLine(string.Format("Mouse cursor position: {0}; Item bounds: {1}", args.CursorPos, args.Bounds));

    MessageBox.Show(strB.ToString());
}

void reportViewer1_InteractiveActionExecuting(object sender, Telerik.ReportViewer.Common.InteractiveActionCancelEventArgs args)
{
    var navigateToUrlAction = args.Action as Telerik.Reporting.Processing.NavigateToUrlAction;
    if (null != navigateToUrlAction)
    {
        if (!navigateToUrlAction.Url.StartsWith("https"))
        {
            args.Cancel = MessageBox.Show("You are about to navigate to a non-secure page. Continue?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != System.Windows.Forms.DialogResult.Yes;
        }
    }
}

' Handles the InteractiveActionExecuting event

' Do not forget to add the WithEvents clause on ReportViewer1 instantiation if needed.
Private Sub reportViewer1_CustomInteractiveActionExecuting(sender As Object, args As Telerik.ReportViewer.Common.InteractiveActionCancelEventArgs) Handles ReportViewer1.InteractiveActionExecuting

    Dim strB = New System.Text.StringBuilder()
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName)

    Dim customAction = TryCast(args.Action, Telerik.Reporting.Processing.CustomAction)
    If customAction IsNot Nothing Then
        For Each p As KeyValuePair(Of String, Object) In customAction.Parameters
            strB.AppendLine(String.Format("Parameter ""{0}"" value: {1}", p.Key, p.Value))
        Next
    End If

    strB.AppendLine(String.Format("Mouse cursor position: {0}; Item bounds: {1}", args.CursorPos, args.Bounds))

    MessageBox.Show(strB.ToString())
End Sub 

' Handles the InteractiveActionExecuting event

' Do not forget to add the WithEvents clause on ReportViewer1 instantiation if needed.
Private Sub reportViewer1_CustomInteractiveActionExecuting(sender As Object, args As Telerik.ReportViewer.Common.InteractiveActionCancelEventArgs) Handles ReportViewer1.InteractiveActionExecuting

    Dim strB = New System.Text.StringBuilder()
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName)

    Dim customAction = TryCast(args.Action, Telerik.Reporting.Processing.CustomAction)
    If customAction IsNot Nothing Then
        For Each p As KeyValuePair(Of String, Object) In customAction.Parameters
            strB.AppendLine(String.Format("Parameter ""{0}"" value: {1}", p.Key, p.Value))
        Next
    End If

    strB.AppendLine(String.Format("Mouse cursor position: {0}; Item bounds: {1}", args.CursorPos, args.Bounds))

    MessageBox.Show(strB.ToString())
End Sub 

void reportViewer1_InteractiveActionLeave(object sender, Telerik.ReportViewer.Common.InteractiveActionEventArgs args)
{
    var strB = new System.Text.StringBuilder();
    strB.AppendLine("You have just left an action area.");
    strB.AppendLine("Action type: " + args.Action.GetType().Name);
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName);
    strB.AppendLine(string.Format("Item bounds: {0}", args.Bounds));

    Console.Out.WriteLine(strB.ToString());
}

' Handles the InteractiveActionLeave event

' Do not forget to add the WithEvents clause on ReportViewer1 instantiation if needed.
Private Sub reportViewer1_InteractiveActionLeave(sender As Object, args As Telerik.ReportViewer.Common.InteractiveActionEventArgs) Handles ReportViewer1.InteractiveActionLeave

    Dim strB = New System.Text.StringBuilder()
    strB.AppendLine("You have just left an action area.")
    strB.AppendLine("Action type: " + args.Action.[GetType]().Name)
    strB.AppendLine("ReportItem name: " + args.Action.ReportItemName)
    strB.AppendLine(String.Format("Item bounds: {0}", args.Bounds))

    Console.Out.WriteLine(strB.ToString())
End Sub 

void reportViewer1_PrintBegin(object sender, Telerik.ReportViewer.Common.PrintBeginEventArgs e)
{
    if (true) // some logic here
    {
        // Cancel is false by default
        e.Cancel = true;
    }

    //To prevent the Print Dialog from appearing, you should specify valid printer settings to this method.
    if (true)
    {
        // Obtain the settings of the default printer
        e.PrinterSettings = new System.Drawing.Printing.PrinterSettings();

        // To suppress the Print dialogs. The standard print controller comes with no UI
        e.PrintController = new System.Drawing.Printing.StandardPrintController();
    }
}

Private Sub reportViewer1_PrintBegin(sender As Object, e As Telerik.ReportViewer.Common.PrintBeginEventArgs)
    If True Then

        ' some logic here


        ' Cancel is false by default

        e.Cancel = True
    End If

    If True Then
        e.PrinterSettings.Copies = 2
    End If


    ' To prevent the Print Dialog from appearing, you should specify valid printer settings to this method.

    If True Then

        ' Obtain the settings of the default printer

        e.PrinterSettings = New System.Drawing.Printing.PrinterSettings()


        ' To suppress the Print dialogs. The standard print controller comes with no UI

        e.PrintController = New System.Drawing.Printing.StandardPrintController()
    End If
End Sub 

Private Sub reportViewer1_PrintEnd(sender As Object, e As Telerik.ReportViewer.Common.PrintEndEventArgs)

    ' suitable for logging and triggering other actions

End Sub 

void reportViewer1_PrintEnd(object sender, Telerik.ReportViewer.Common.PrintEndEventArgs e)
{
    // suitable for logging and triggering other actions
}

void reportViewer1_RenderingBegin(object sender, Telerik.ReportViewer.Common.RenderingBeginEventArgs e)
{
    if (true) // some logic here
    {
        // Cancel is false by default
        e.Cancel = true;
    }
}

Private Sub reportViewer1_RenderingBegin(sender As Object, e As Telerik.ReportViewer.Common.RenderingBeginEventArgs)
    If True Then

        ' some logic here


        ' Cancel is false by default

        e.Cancel = True
    End If
End Sub 

void reportViewer1_RenderingEnd(object sender, Telerik.ReportViewer.Common.RenderingEndEventArgs e)
{
    // suitable for logging and triggering other actions
}

Private Sub reportViewer1_RenderingEnd(sender As Object, e As Telerik.ReportViewer.Common.RenderingEndEventArgs)

    ' suitable for logging and triggering other actions

End Sub 

void reportViewer1_UpdateUI(object sender, System.EventArgs e)
{
    // invoked whenever the viewer state is changed
}

Private Sub reportViewer1_UpdateUI(sender As Object, e As System.EventArgs)

    ' invoked whenever the viewer state is changed

End Sub 

private void reportViewer1_ViewerToolTipOpening(object sender, Telerik.ReportViewer.Common.ToolTipOpeningEventArgs args)
{
    if (args.ToolTip.Title.Contains("DoNotShow"))
    {
        args.Cancel = true;
    }
    else
    {
        args.ToolTip.Title = "The tooltip title is changed!";
        args.ToolTip.Text += " (changed)";
    }
}

' Handles the ViewerToolTipOpening event

' Do not forget to add the WithEvents clause on ReportViewer1 instantiation if needed.
Private Sub reportViewer1_ViewerToolTipOpening(sender As Object, args As Telerik.ReportViewer.Common.ToolTipOpeningEventArgs) Handles ReportViewer1.ViewerToolTipOpening
    If args.ToolTip.Title.Contains("DoNotShow") Then
        args.Cancel = True
    Else
        args.ToolTip.Title = "The tooltip title is changed!"
        args.ToolTip.Text += " (changed)"
    End If
End Sub