在 C# 中将数据表转换为 JSON [英] Convert datatable to JSON in C#

问题描述

1. 我想将数据库中的记录放入DataTable.
2. 然后将 DataTable 转换为 JSON 对象.
3. 将 JSON 对象返回给我的 JavaScript 函数.

1. I want to get records from database into a DataTable.
2. Then convert the DataTable into a JSON object.
3. Return the JSON object to my JavaScript function.

我使用这个代码调用:

string result = JsonConvert.SerializeObject(DatatableToDictionary(queryResult, "Title"), Newtonsoft.Json.Formatting.Indented);

要将 DataTable 转换为 JSON，它可以正常工作并返回以下内容:

To convert a DataTable to JSON, it works correctly and return the following:

{
    "1": {
    "viewCount": 703,
    "clickCount": 98
    },
    "2": {
    "viewCount": 509,
    "clickCount": 85
    },
    "3": {
    "viewCount": 578,
    "clickCount": 86
    },
    "4": {
    "viewCount": 737,
    "clickCount": 108
    },
    "5": {
    "viewCount": 769,
    "clickCount": 130
    }
} 

但我希望它返回以下内容:

But I would like it to return the following:

{"records":[
{
"Title": 1,
"viewCount": 703,
"clickCount": 98
},
{
"Title": 2,
"viewCount": 509,
"clickCount": 85
},
{
"Title": 3,
"viewCount": 578,
"clickCount": 86
},
{
"Title": 4,
"viewCount": 737,
"clickCount": 108
},
{
"Title": 5,
"viewCount": 769,
"clickCount": 130
}
]} 

我该怎么做?

推荐答案

此代码片段来自 Convert Datatable to JSON String in C#, VB.NET 可能对你有帮助.它使用 系统.Web.Script.Serialization.JavaScriptSerializer 将内容序列化为 JSON 格式:

This code snippet from Convert Datatable to JSON String in C#, VB.NET might help you. It uses System.Web.Script.Serialization.JavaScriptSerializer to serialize the contents to JSON format:

public string ConvertDataTabletoString()
{
    DataTable dt = new DataTable();
    using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Initial Catalog=master;Integrated Security=true"))
    {
        using (SqlCommand cmd = new SqlCommand("select title=City,lat=latitude,lng=longitude,description from LocationDetails", con))
        {
            con.Open();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(dt);
            System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
            List<Dictionary<string, object>> rows = new List<Dictionary<string, object>>();
            Dictionary<string, object> row;
            foreach (DataRow dr in dt.Rows)
            {
                row = new Dictionary<string, object>();
                foreach (DataColumn col in dt.Columns)
                {
                    row.Add(col.ColumnName, dr[col]);
                }
                rows.Add(row);
            }
            return serializer.Serialize(rows);
        }
    }
}

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