I need help reading all the rows from excel sheet as a test data in my selenium test case.

I can read only one row of an excel sheet with the following code.

//set up test for selenium

 public void SetupTest()
    {
        selenium = new DefaultSelenium("localhost", 4444, "*googlechrome", "http://www.google.com/");
        selenium.Start();
        verificationErrors = new StringBuilder();
    }

//Connects me to my excel sheet which is SampleTestData.xls

public void ConnectExcel()
{
 excel.Application excelApp = new excel.Application();
 excelApp.Visible = true;
 string ExcelDataPath = @"C:\SampleTestData.xls";
 excel.Workbook excelWorkBook = excelApp.Workbooks.Open(ExcelDataPath, 0, false, 5, "", "", false, excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
 excel.Sheets excelSheets = excelWorkBook.Worksheets;
 excel.Worksheet DataworkSheet = (excel.Worksheet)excelSheets.get_Item("Sheet1");
 System.String Search1 = ((excel.Range)DataworkSheet.get_Range("A1", Type.Missing)).Value2 as string;
 }

//selenium code to run the test

public void StartTest()
{
selenium.open("");
selenium.WaitForPageToLoad("100000");
selenium.Type("gbqfif", search1);
selenium.Click("btnG");
selenium.WaitForPageToLoad("100000");

}

This code lets me select only one row that contains value of search1. However, I need to iterate it such a way that it will keep running StartTest() method until all the rows(50) in the excel sheet are entered.

Any help would be appreciated.