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copied!<p>Yeap. You can do that in a little tricky way. I had a task to add more scale factors to zoom report. I did it this way:</p> <pre><code> private readonly string[] ZOOM_VALUES = { "25%", "50%", "75%", "100%", "110%", "120%", "125%", "130%", "140%", "150%", "175%", "200%", "300%", "400%", "500%" }; private readonly int DEFAULT_ZOOM = 3; //-- public ucReportViewer() { InitializeComponent(); this.reportViewer1.ProcessingMode = ProcessingMode.Local; setScaleFactor(ZOOM_VALUES[DEFAULT_ZOOM]); Control[] tb = reportViewer1.Controls.Find("ReportToolBar", true); ToolStrip ts; if (tb != null && tb.Length > 0 && tb[0].Controls.Count > 0 && (ts = tb[0].Controls[0] as ToolStrip) != null) { //here we go if our trick works (tested at .NET Framework 2.0.50727 SP1) ToolStripComboBox tscb = new ToolStripComboBox(); tscb.DropDownStyle = ComboBoxStyle.DropDownList; tscb.Items.AddRange(ZOOM_VALUES); tscb.SelectedIndex = 3; //100% tscb.SelectedIndexChanged += new EventHandler(toolStripZoomPercent_Click); ts.Items.Add(tscb); } else { //if there is some problems - just use context menu ContextMenuStrip cmZoomMenu = new ContextMenuStrip(); for (int i = 0; i < ZOOM_VALUES.Length; i++) { ToolStripMenuItem tsmi = new ToolStripMenuItem(ZOOM_VALUES[i]); tsmi.Checked = (i == DEFAULT_ZOOM); //tsmi.Tag = (IntPtr)cmZoomMenu; tsmi.Click += new EventHandler(toolStripZoomPercent_Click); cmZoomMenu.Items.Add(tsmi); } reportViewer1.ContextMenuStrip = cmZoomMenu; } } private bool setScaleFactor(string value) { try { int percent = Convert.ToInt32(value.TrimEnd('%')); reportViewer1.ZoomMode = ZoomMode.Percent; reportViewer1.ZoomPercent = percent; return true; } catch { return false; } } private void toolStripZoomPercent_Click(object sender, EventArgs e) { ToolStripMenuItem tsmi = sender as ToolStripMenuItem; ToolStripComboBox tscb = sender as ToolStripComboBox; if (tscb != null && tscb.SelectedIndex > -1) { setScaleFactor(tscb.Items[tscb.SelectedIndex].ToString()); } else if (tsmi != null) { if (setScaleFactor(tsmi.Text)) { foreach (ToolStripItem tsi in tsmi.Owner.Items) { ToolStripMenuItem item = tsi as ToolStripMenuItem; if (item != null && item.Checked) { item.Checked = false; } } tsmi.Checked = true; } else { tsmi.Checked = false; } } } </code></pre>

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