Question

我想在ASP.net（图片库）中使用JSON文件作为静态内容的数据库。一切运作良好：我可以读取文件并检索数据并以简单的方式显示它们。我目前正在使用JSON.net和c＃serverside。

这是我的JSON（手工制作）的一部分：

{
    "Category 1": [
        {
            "TitleFile": "Title of IMG1",
            "FileName": "IMG1",
            "URLThumbFile": "Content/images/Gallery/IMG1_tb.png",
            "URLFile": "Content/images/Gallery/IMG1.png",
            "DescFile": "DESC IMG1"
        },
        {
            "TitleFile": "Title of IMG2",
            "FileName": "IMG2",
            "URLThumbFile": "Content/images/Gallery/IMG2_tb.png",
            "URLFile": "Content/images/Gallery/IMG2.png",
            "DescFile": "DESC IMG2"

        }
    ],
    "Category 2": [
        {
            "TitleFile": "Title of IMG3",
            "FileName": "IMG3",
            "URLThumbFile": "Content/images/Gallery/IMG3_tb.png",
            "URLFile": "Content/images/Gallery/IMG3.png",
            "DescFile": "DESC IMG3"
        },
        {
            "TitleFile": "Title of IMG4",
            "FileName": "IMG4",
            "URLThumbFile": "Content/images/Gallery/IMG4_tb.png",
            "URLFile": "Content/images/Gallery/IMG4.png",
            "DescFile": "DESC IMG4"
        }
    ],
    "Category 3": [
        {
            "TitleFile": "Title of IMG5",
            "FileName": "IMG5",
            "URLThumbFile": "Content/images/Gallery/IMG5_tb.png",
            "URLFile": "Content/images/Gallery/IMG5.png",
            "DescFile": "DESC IMG5"
        }
    ]
}

现在，我正在想办法创建一种“上传表单”，以便编写这个JSON文件并存储信息。客户端，一切都很好：

<asp:TextBox runat="server" ID="txtFileName" />
<asp:TextBox runat="server" ID="txtFileTitle" />
<asp:TextBox runat="server" ID="txtFileDesc" />
<asp:FileUpload runat="server" ID="UPLFileImg" />
<asp:DropDownList runat="server" ID="ddlCategory"/>
<asp:Button runat="server" ID="btnUploadFile" Text="Upload" OnClick="btnUploadFile_Click" />

C＃方：

//Classes
public class JSONGalleryCategory //is it correct??
{
    public List<JSONGalleryContent> Category { get; set; }

}

public class JSONGalleryContent //??
{
    public string FileTitle { get; set; }
    public string FileName { get; set; }
    public string URLThumbFile { get; set; }
    public string URLFile { get; set; }
    public string DescFile { get; set; }
    public DateTime DataFile { get; set; }
}

//in the .aspx.cs
private void PopulateDDL()
{
    List<string> items = new List<string>();
    dynamic jsonFile = JObject.Parse(Utilities.ReadFile("~/Content/images/Gallery/Gallery.json"));
    foreach (JProperty category in jsonFile)
    {
        items.Add(category.Name);
    }
    ddlCategory.DataSource = items;
    ddlCategory.DataBind();
}

protected void btnUploadFile_Click(object sender, EventArgs e)
{           
    if (UPLFileImg.HasFile)
    {
        string fileName = Path.Combine(Server.MapPath("~/Content/images/Gallery/"), UPLFileImg.FileName);
        UPLFileImg.SaveAs(fileName);
        //Open Jsonfile...read content...deserialize?
        dynamic jsonFile = JObject.Parse(Utilities.ReadFile("~/Content/images/Gallery/Gallery.json"));
        //Create new node?
        //???

        //append new node?

        //serialize again and save...? ordering nodes??
        Utilities.WriteFile("~/Content/images/Gallery/Gallery.json", JsonConvert.SerializeObject("???", Formatting.Indented));
        Utilities.ShowMessage("Success");
    }
    else
    {
        Utilities.ShowMessage("Error");
    }
}

我怎样才能获得它？

提前致谢！

Answer 1

 dynamic jsonFile = JObject.Parse(Utilities.ReadFile("~/Content/images/Gallery/Gallery.json"));

using (FileStream fs = File.Open(@"~/Content/images/Gallery/Gallery.json", FileMode.Open)) //may have to server.mappath this
using (StreamWriter sw = new StreamWriter(fs))
using (JsonWriter jw = new JsonTextWriter(sw))
{
    jw.Formatting = Formatting.Indented;

    JsonSerializer serializer = new JsonSerializer();
    serializer.Serialize(jw, jsonFile);
}

Answer 2

一个老问题，但如果您想将文件用作 json 数据库，您可以检查 this link。这是一个专业且易于使用的库

JSON文件作为数据库

2 个答案: