private void btnShowRunTime_Click(object sender, EventArgs e) { cboRunTimeValues.Visible = true; string StrTestData = txtTestDataPath.Text.Trim(); if (StrTestData == String.Empty) { MessageBox.Show("Please Choose one file for TestData!", "Error"); cboRunTimeValues.Visible = false; return; } ExcelOpera GetData = new ExcelOpera(); List<string> strRunTimeForRunValues = GetData.GetRunTimeForRun(StrTestData); PublicFunction Function = new PublicFunction(); List<string> strRunTimeValues = Function.getNewList(strRunTimeForRunValues); cboRunTimeValues.DataSource = strRunTimeValues; }