How do find min value based on parameter from excel range column by column using C#

Question

I have below data in my excel table. i am passing parameter value "9050".

Here the value should search from column by column of every cell values.

for example,

Input value "9050", it will come near by column of "B" and data between 8942.16 and 9138.26

Here the minimum value of "8942" should be a result value of "9050".

Excel.Application xlApp = new Excel.Application();
Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\Project\Test\testExcel.xlsx");
Worksheet sheet = xlWorkbook.ActiveSheet;
try
{
//search row wise cell, but need column wise cell
int startRow = 1;
char startColumn = 'A';
int endRow = 13;
char endColumn = 'D';
int ParamNum = 9050;

            int intStartY = (int)startColumn - 64;  
            int intEndY = (int)endColumn - 64;  

            List<double> data1 = new List<double>();  
            for (int j = intStartY; j <= intEndY; j++)  
            {  
                for (int i = startRow; i <= endRow; i++)  
                {  
                    if (sheet.Cells[i, j].Value != null)  
                    {  
                        data1.Add(Convert.ToDouble(sheet.Cells[i, j].Value));  
                        ?????????// How we have to check the minimum value of "9050"  
                        //9050 ==> this value will come in between of 8942.16 and 9138.26  
                        //So 8942.16 ==> Result and final value  
                    }  
                }  
            }  

Answer 1

Check if this code needs adjustments after giving new details:

double foundMinValue = -1;
int foundColumn = -1;

for (int j = intStartY; j <= intend && foundColumn < 0; j++)
{
   for (int i = startRow; i < endRow && foundColumn < 0; i++)
   {
      if (sheet.Cells[i, j].Value == null) continue;
      if (sheet.Cells[i + 1, j].Value == null) continue;

      double v1 = Convert.ToDouble(sheet.Cells[i, j].Value);
      double v2 = Convert.ToDouble(sheet.Cells[i + 1, j].Value);
      double min = Math.Min( v1, v2 );
      double max = Math.Max( v1, v2 );

      if( ParamNum >= min && ParamNum <= max) 
      {
         foundColumn = j;
         foundMinValue = min;
      }
   }
}