Question

我想比较两张桌子。如果行x和y不相等，我想获得像Equal / Unequal这样的输出。所以应该报告一切可能，但我不知道最好的方法是什么。我只需要一些例子来获得更好的想法：

我的TableModel课程：

class TableModel {
    private string tableName;
    private string[] headers;
    private string[] keys;

    public int RowCount { get; set; }
    public string TableName { get { return tableName; } set { this.tableName = value; } }
    public string[] Headers { get { return headers; } set { this.headers = value; } }
    public string[] Keys { get { return keys; } set { this.keys = value; } }
}

我的Compare课程：

private void StartCompare() {
        int counter = 0;

        foreach(string nkey in newModel.Keys){
            foreach(string ckey in currentModel.Keys){
                if(!nkey.Equals(ckey)){
                    counter++;
                } 
            }

            if(currentModel.Keys.Length -1 != counter){
                //row not found in currentModel
            }
        }
    }

Answer 1

我建议使用String[] Keys而不是比较问题中的数组（HashSet<String>，因为基于散列的搜索更快 - O（1）与O（N）相比;那样：

HashSet<String> newKeys = new HashSet<String>(newModel.Keys);
HashSet<String> currentKeys = new HashSet<String>(currentModel.Keys);

foreach (String key in newKeys)
  if (!currentKeys.Contains(key)) {
    // The key is in the new model, but not in the current one

    //TODO: put the relevant code here:
  }

foreach (String key in currentKeys)
  if (!newKeys.Contains(key)) {
    // The key is in the current model, but not in the new one

    //TODO: put the relevant code here: 
  }

有效地比较表格

1 个答案: