如何将列表存储到字典中 [英] How do I store list into dictionary

问题描述

Hello House，



我希望能够将两个列表项添加到字典中，下面是我的代码：

Hello House,

I want to be able to add two list items into dictionary, below is my code:

var attributeValues = new Dictionary<string   , string >();
                    var listAttributeName = new List<string>();
                    var listAttributeRegion = new List<string>();
                    var listAttributeIdSplit = new List<string>();



                    var command = new SqlCommand("select [AttrName], [RegionName] from csowner.CatRegionMap where CatName = 'lands'",connection);
                    command.CommandType = CommandType.Text;
                    connection.Open();

                    SqlDataReader reader = command.ExecuteReader();

                    while (reader.Read())
                    {

                        listAttributeName.Add(reader["AttrName"].ToString().ToUpper());
                        listAttributeRegion.Add(reader["RegionName"].ToString());


                        attributeValues.Add( listAttributeName.Add( reader["AttrName"] ), listAttributeRegion.Add( reader["RegionName"] ) );


                    }

i尝试将listAttributeName和listAttributeRegion添加到attributeValues，这是例外，请问我能做到这一点吗？



提前谢谢。

i tried adding listAttributeName and listAttributeRegion to attributeValues, it is giving exception, please is there anyway i can do this?

Thanks in advance.

推荐答案

如果您有兴趣将列表项添加到Dictionary，那么，你必须做类似下面的事情

If you are interested in adding the list items to Dictionary then, you have to do something like below

attributeValues.Add( reader["AttrName"].ToString(), reader["RegionName"].ToString() );

由于您的字典是使用键和值声明为字符串，因此您必须在其中添加字符串项。



希望它可以帮到你。

Since your dictionary is declared with key and value as string, you will have to add string items into it.

Hope it helps you.

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