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[CLOSED] Cannot deserialize JSON object into type 'System.Collections.Generic.Dictionary`2[System.String,System.String][]

  1. #1
    Feb 01, 2011, 4:03 AM

    [CLOSED] Cannot deserialize JSON object into type 'System.Collections.Generic.Dictionary`2[System.String,System.String][]

    Hi...

    i have kept this code in Page_Load,when try to run this im getting Error:"Cannot deserialize JSON object into type 'System.Collections.Generic.Dictionary`2[System.String,System.String][]"





    string r ="{ID:1,Name:Hi Rest}";
                Dictionary<string, string>[] companies = JSON.Deserialize<Dictionary<string, string>[]>(r);
               

                StringBuilder sb = new StringBuilder();

                foreach (Dictionary<string, string> row in companies)
                {
                    foreach (KeyValuePair<string, string> keyValuePair in row)
                    {
                        sb.Append(keyValuePair.Key);
                        if (keyValuePair.Key.ToString() == "ID")
                        {
                            txtID.Text = Convert.ToString(keyValuePair.Value);
                        }
                        else if (keyValuePair.Key.ToString() == "Name")
                        {
                            txtName.Text = Convert.ToString(keyValuePair.Value);
                        }
                    }
                }
    Please solve my problem
    Last edited by Daniil; Feb 02, 2011 at 10:43 AM. Reason: [CLOSED]
  2. #2
    Feb 01, 2011, 10:17 AM
    Hi,

    Let's consider this string
    string r = "{ID:1,Name:Hi Rest}";
    If you need array please use square brackets in json string - '[ array items ]'.

    Also wrap string in apostrophes if there is any space characters - 'Hi Rest'.

    Generally speaking, it would be best to use apostrophes even there is no space character - '1'.

    So, in according to the Type that you chose
    Dictionary<string, string>[]
    string must look like this
    string r = "[{ID:'1',Name:'Hi Rest'}]";
  3. #3
    Feb 01, 2011, 11:30 AM
    Quote Originally Posted by Daniil View Post
    Hi,

    Let's consider this string
    string r = "{ID:1,Name:Hi Rest}";
    If you need array please use square brackets in json string - '[ array items ]'.

    Also wrap string in apostrophes if there is any space characters - 'Hi Rest'.

    Generally speaking, it would be best to use apostrophes even there is no space character - '1'.

    So, in according to the Type that you chose
    Dictionary<string, string>[]
    string must look like this
    string r = "[{ID:'1',Name:'Hi Rest'}]";

    Hi, it is workin fine ..but i have One Dought..

    Without using these "[]" we cannot deserilize

    Any Alternative way is there.
  4. #4
    Feb 01, 2011, 11:38 AM
    If you need
    Dictionary<string, string>[]
    square brackets are required.

    Well, without square brackets it will just, for example:
    Dictionary<string, string>
    Example
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        string r = "{ID:'1', Name:'Hi Rest'}";
        Dictionary<string, string> company = JSON.Deserialize<Dictionary<string, string>>(r);


        foreach (KeyValuePair<string, string> keyValuePair in company)
        {
            if (keyValuePair.Key.ToString() == "ID")
            {
                TextField1.Text = Convert.ToString(keyValuePair.Value);
            }
            else if (keyValuePair.Key.ToString() == "Name")
            {
                TextField1.Text = Convert.ToString(keyValuePair.Value);
            }
        }
    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Ext.Net Example</title>
</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    <ext:TextField ID="TextField1" runat="server" />
    <ext:TextField ID="TextField2" runat="server" />
    </form>
</body>
</html>
  5. #5
    Feb 01, 2011, 11:54 AM
    Quote Originally Posted by Daniil View Post
    If you need
    Dictionary<string, string>[]
    square brackets are required.

    Well, without square brackets it will just, for example:
    Dictionary<string, string>
    Example
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        string r = "{ID:'1', Name:'Hi Rest'}";
        Dictionary<string, string> company = JSON.Deserialize<Dictionary<string, string>>(r);


        foreach (KeyValuePair<string, string> keyValuePair in company)
        {
            if (keyValuePair.Key.ToString() == "ID")
            {
                TextField1.Text = Convert.ToString(keyValuePair.Value);
            }
            else if (keyValuePair.Key.ToString() == "Name")
            {
                TextField1.Text = Convert.ToString(keyValuePair.Value);
            }
        }
    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Ext.Net Example</title>
</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    <ext:TextField ID="TextField1" runat="server" />
    <ext:TextField ID="TextField2" runat="server" />
    </form>
</body>
</html>

    Hi,

    Thank's for your reply. It is working fine

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