问题描述
我认为以下是一项非常常见的任务,并假设有一个简单的解决方案,但我找不到.
如果我有以下结构的数据表.
ID 名称 有效ID1 约翰 TRUEID2 账单错误
我想将其序列化为 JSON 对象,其中 ID 列是 JSON 对象中的一个节点,例如:
[{ID1":{"姓名": "约翰",主动":真实"},ID2":{"姓名": "比尔",主动":假"}}]我查看了 JSON.NET,但无法让它工作.我正在使用 C#
这对于 JSON.NET 来说非常简单.只需将您的数据表转换为等效的字典字典:
public Dictionary>DatatableToDictionary(DataTable dt, 字符串 id){var cols = dt.Columns.Cast().Where(c => c.ColumnName != id);返回 dt.Rows.Cast().ToDictionary(r => r[id].ToString(),r=>cols.ToDictionary(c => c.ColumnName, c => r[c.ColumnName]));}
然后调用:
JsonConvert.SerializeObject(DatatableToDictionary(dt, "ID"), Newtonsoft.Json.Formatting.Indented);
这是完整的测试:
var dt = new DataTable("MyTable");dt.Columns.Add("ID");dt.Columns.Add("名称");dt.Columns.Add("Active");dt.LoadDataRow(new[] {"ID1", "John", "True"}, true);dt.LoadDataRow(new[] {"ID2", "Bill", "False"}, true);JsonConvert.SerializeObject(DatatableToDictionary(dt, "ID"));
结果:
{ID1":{"姓名": "约翰",主动":真实"},ID2":{"姓名": "比尔",主动":假"}}
I thought the following would be a pretty common task and assumed there would be an easy solution for it, but i can't find one.
If I have a datatable in the following structure.
ID Name Active
ID1 John TRUE
ID2 Bill FALSE
I would like to serialize it as a JSON object where the ID column is a node in the JSON object like:
[
{
"ID1": {
"Name": "John",
"Active": "True"
},
"ID2": {
"Name": "Bill",
"Active": "False"
}
}
]
I looked into JSON.NET but could not get it to work.Edit: I'm using C#
This is quite simple with JSON.NET. Just convert your data table into the equivalent dictionary of dictionaries:
public Dictionary<string, Dictionary<string, object>> DatatableToDictionary(DataTable dt, string id)
{
var cols = dt.Columns.Cast<DataColumn>().Where(c => c.ColumnName != id);
return dt.Rows.Cast<DataRow>()
.ToDictionary(r => r[id].ToString(),
r => cols.ToDictionary(c => c.ColumnName, c => r[c.ColumnName]));
}
Then call:
JsonConvert.SerializeObject(DatatableToDictionary(dt, "ID"), Newtonsoft.Json.Formatting.Indented);
Here's the full test:
var dt = new DataTable("MyTable");
dt.Columns.Add("ID");
dt.Columns.Add("Name");
dt.Columns.Add("Active");
dt.LoadDataRow(new[] {"ID1", "John", "True"}, true);
dt.LoadDataRow(new[] {"ID2", "Bill", "False"}, true);
JsonConvert.SerializeObject(DatatableToDictionary(dt, "ID"));
And the result:
{
"ID1": {
"Name": "John",
"Active": "True"
},
"ID2": {
"Name": "Bill",
"Active": "False"
}
}
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