Image Viewer CP Pro SDK ActiveX

Step 1: To install the Image Viewer CP Pro SDK ActiveX, begin by launching the setup file (http://www.viscomsoft.com/demo/imageviewercpprosetup.exe). Select the desired installation folder for the Image Viewer CP Pro SDK ActiveX and continue with the installation on your development computer.

Step 2: Launch VS 2019, click Create a new project button, then select Windows Forms App(.NET Framework) for C# option , click Next button.

Step 3: In Toolbar, right click the mouse, select Choose Items...

Step 4: select COM Components - select Image Viewer CP Pro ActiveX. 



Step 5: drag the Image Viewer CP Pro ActiveX from toolbar to form and create the UI like the following

Step 6: In PDF File1's Select button click event, add the following code

this.openFileDialog1.Filter = "PDF (*.pdf)|*.pdf";
if (this.openFileDialog1.ShowDialog(this) == DialogResult.OK)
{
                textBox1.Text = openFileDialog1.FileName;
}

Step 7: In PDF File2's Select button click event, add the following code

this.openFileDialog1.Filter = "PDF (*.pdf)|*.pdf";
if (this.openFileDialog1.ShowDialog(this) == DialogResult.OK)
{
                textBox2.Text = openFileDialog1.FileName;
}

Step 8: In Merge button click event, add the following code

bool bResult;

            if (textBox1.Text == "")
                return;

            if (textBox2.Text == "")
                return;
            saveFileDialog1.Filter = "PDF file (*.pdf)|*.pdf||";

            this.saveFileDialog1.DefaultExt = "pdf";

            if (this.saveFileDialog1.ShowDialog(this) == DialogResult.OK)
            {
                bResult = axImageViewer1.PDFEditMergeWithBookmarks(textBox1.Text, textBox2.Text, saveFileDialog1.FileName, textBox3.Text,      textBox4.Text, textBox5.Text);

                if (bResult)
                    MessageBox.Show("Merge Completed");
                else
                    MessageBox.Show("Merge Failed");

            }

Download the C# Merge pdf files and Create the Bookmarks sample source code