Unable to load an excel file in SpreadJS

Hi

I have used this https://wisej.com/support/question/wisej-integrated-with-componentone-spreadjs,  as my starting point and was able to get the SpreadJS working in the Page. I  have been testing and on the same page got some buttons to test  the Tabs (show/hide), from C# push data into Cells, these are working fine.

I have been trying to load as excel file from C# but not working. I  have place console.log(…) to log any errors and the steps.

So far no exceptions.

I have attached my test project and I have provided a sample excel file in the project/files folder.

in the Tools.cs page,  I read file as Byte[], the convert to Base64 and pass that through. No Luck

I have tried to pass the Byte[] array as well. Does not work.

If someone can help me resolve this, i would be greatly appreciative.

 private async void button3_Click(object sender, EventArgs e)
 {
 try
 {

// Read File

//Convert to Base64
 byte[] ofile = File.ReadAllBytes(@"C:\Work_Offline\TestWB_Nancy.xlsx");

string toB64 = Convert.ToBase64String(ofile);
 await this.widget1.CallAsync("LoadXL", toB64);

// Console.WriteLine(result);
 //textBox1.Text = result;
 }
 catch { Console.WriteLine("Error found in Javascript. - Results returned was null"); }
 }

Thanks Guys
Paresh.
ps. Apologize for the mis-aligned code formatting.