Read Data from Excel to Replace Items in Json

You can implement reading data from excel and then modifying the json string. The specific implementation code is as follows:

private void Submit_Click(object sender, EventArgs e)
{
    string strFileName = @"D:Book1.xlsx";
    object missing = System.Reflection.Missing.Value;
    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();//lauch excel application
    if (excel == null)
    {
        MessageBox.Show("Can’t access excel");
    }
    else
    {
        excel.Visible = false; excel.UserControl = true;
        Microsoft.Office.Interop.Excel.Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
            missing, missing, missing, true, missing, missing, missing, missing, missing);
        Microsoft.Office.Interop.Excel.Worksheet ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets.get_Item(1);
        int rowsint = ws.UsedRange.Cells.Rows.Count;
        Microsoft.Office.Interop.Excel.Range rng1 = ws.Cells.get_Range("A2", "A" + rowsint);
        Microsoft.Office.Interop.Excel.Range rng2 = ws.Cells.get_Range("B2", "B" + rowsint);
        object[,] arry1 = (object[,])rng1.Value2;
        object[,] arry2 = (object[,])rng2.Value2;
        string numbers = "";
        string pn = "";
        foreach (var i in arry1)
        {
            numbers += i.ToString() + " ";
        }
        foreach (var i in arry2)
        {
            pn += i.ToString() + " ";
        }
        string[] nArray = numbers.Split(' ');
        string[] pArray = pn.Split(' ');
        for (int i = 0; i < rowsint - 1; i++)
        {
            string json = "[{'Number':'12345678910','DeviceEventTime':'2017-09-17T07:44:17.696Z','Identifier':'aaaaaaa-bbbb-1111-2223-123456789332','AssemblyCollection':[{'PN': 'ABC-00001','AssemblyNumber': '12345678910'}]]";
            Regex reg1 = new Regex(@"'Number':'(d{11})'");
            string modified = reg1.Replace(json, $"'Number':'{nArray[i]}'");
            Regex reg2 = new Regex(@"'PN': '[A-Z]{3}-w{5}'");
            string newmodified = reg2.Replace(modified, $"'PN': '{pArray[i]}'");
            // ...
            // the code post data
            // ...
        }
    }
}

Before using it, you need to use "System.Text.RegularExpressions" and add "Microsoft.Office.Interop.Excel" from "NuGet". The specific operation is as follows：

Right click the Reference and select "Manage NuGet Packages...", then type "Microsoft.Office.Interop.Excel" in the search bar and install it: