数据行错误，集合被修改；枚举操作可能不会执行 [英] Error in datarow,Collection was modified; enumeration operation might not execute

问题描述

我有 for-each 循环，其中数据行被更新，因此异常，集合被修改；生成的枚举操作可能不会执行.有什么办法解决吗?我见过 To-List 功能，但它不适用于数据行，这是我的代码:

I have for-each loop in which the data row is updated so the exception ,Collection was modified; enumeration operation might not execute is generated. any way to fix it? i have seen To-List function but it is not working with data row , here is my code:

foreach (DataRow row in dataTable.Rows) {
  temp = row[0].ToString();
  foreach (DataRow rows in dataTable.Rows) {
    if (temp == rows[0].ToString()) {
      tempdatatable.Rows.Add(row[0],row[1]);
      dataTable.Rows.Remove(rows);
      //Update happens here
    }
    tempdatatable.DefaultView.Sort = "gscitations DESC";
    dataGridView1.DataSource = tempdatatable;
  }
}

推荐答案

试试这个:

for (int i = 0; i < dataTable.Rows.Count; i++)
{
    var tempRow = dataTable.Rows[i];
    var temp = dataTable.Rows[i][0];
    for (int j = 0; j < dataTable.Rows.Count; j++)
    {
        DataRow rows = dataTable.Rows[j];
        if (temp == rows[0].ToString())
        {
            tempdatatable.Rows.Add(tempRow[0], tempRow[1]);
            dataTable.Rows.Remove(rows);      //Update happen here
        }
        tempdatatable.DefaultView.Sort = "gscitations DESC";
        dataGridView1.DataSource = tempdatatable;
    }
}

这篇关于数据行错误，集合被修改；枚举操作可能不会执行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！