Row Looping in Excel | 易学教程

问题

How to loop a row in excel using c#?

Looping like using datatable

foreach(DataRow _dr in datatable.row)
{
  //data
}

I'm trying and got this one. But it loops per column

foreach (Excel.Range r in usedRange)
{
   // check condition:
   try
   {
      if (Convert.ToInt32(r.Value2.ToString()) == 0)
      {
        // if match, delete and shift remaining cells up:
         r.Delete(Excel.XlDeleteShiftDirection.xlShiftUp);
        break;
      }
    }
    catch { }
}

回答1:

Further to my comments

When you loop through a range, it always loops left to right and not up to down (unless the range has only one column)

Let's say your excel sheet looks like this

enter image description here

TRIED AND TESTED

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;

Namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        Public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Microsoft.Office.Interop.Excel.Application xlexcel;
            Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
            Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
            Microsoft.Office.Interop.Excel.Range xlRange;

            object misValue = System.Reflection.Missing.Value;

            xlexcel = new Excel.Application();
            xlexcel.Visible = true;

            // Open a File
            xlWorkBook = xlexcel.Workbooks.Open("C:\\Book1.xlsx", 0, true, 5, "", "", true,
            Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);

            // Set Sheet 1 as the sheet you want to work with
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

            xlRange = xlWorkSheet.UsedRange;

            for (int i = 1; i <= xlRange.Rows.Count; i++)
            {
                for (int j = 1; j <=  xlRange.Columns.Count; j++)
                {
                    if (xlexcel.WorksheetFunction.CountIf(xlRange.Cells[i, j], "0") > 0)
                    {
                        MessageBox.Show("Row " + i + " has 0");
                        break;
                    }
                }
            }

            //Once done close and quit Excel
            xlWorkBook.Close(false, misValue, misValue);
            xlexcel.Quit();

            releaseObject(xlWorkSheet);
            releaseObject(xlWorkBook);
            releaseObject(xlexcel);
        }

        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                MessageBox.Show("Unable to release the Object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }
    }
}

This is what you get

enter image description here

回答2:

My bad, I confused your code blocks.

Assuming you have a worksheet called sheet, try this:

foreach (var row in sheet.UsedRange.Rows)
{
    // either put your logic here, 
    // or look at columns if you prefer 
    /*
    foreach (var cell in row.Columns)
    {
       // do something with cells 
    } 
    /*
}

来源：https://stackoverflow.com/questions/19857321/row-looping-in-excel

标签

excel