从 C# 向 Javascript 发送参数

Question

我在 javascript 上遇到了一些问题。我给js发送参数发送数据是：

即将到来的javascript是：

c#代码：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    ' JSonID.Value = "{""id"":""1"",""name"":""1"",""data"":""0,3048"",""children"":[{""id"":""11"",""name"":""11"",""data"":""0,3048"",""children"":[{""id"":""111"",""name"":""111"",""data"":""0,3048"",""children"":[]},{""id"":""112"",""name"":""112"",""data"":""0,3048"",""children"":[{""id"":""1121"",""name"":""1121"",""data"":""0,3048"",""children"":[]},{""id"":""1122"",""name"":""1122"",""data"":""0,3048"",""children"":[]}]}]},{""id"":""12"",""name"":""12"",""data"":""0,3048"",""children"":[]},{""id"":""13"",""name"":""13"",""data"":""0,3048"",""children"":[{""id"":""131"",""name"":""131"",""data"":""0,3048"",""children"":[{""id"":""1311"",""name"":""1311"",""data"":""0,3048"",""children"":[]}]},{""id"":""132"",""name"":""132"",""data"":""0,3048"",""children"":[]}]},{""id"":""14"",""name"":""14"",""data"":""0,3048"",""children"":[]}]}"
    'ScriptManager.RegisterStartupScript(UpdatePanel1, Me.GetType(), "GraphFunction", "drawChart()", True)

    If Page.IsPostBack AndAlso GraphNames.SelectedIndex >= 0 Then
        SetGraph(GraphNames.SelectedIndex)
    End If

    If Not Page.IsPostBack Then
        OnOffCheck.Items.Add("On")
        OnOffCheck.Items.Add("Off")
        Menu1.Items(0).Selected = True

        StaticService.CreateErrorDictionary()
        RunDBInfo()

        Label4.Text = ""
        If Page.IsPostBack AndAlso GraphNames.SelectedIndex >= 0 Then
            SetGraph(GraphNames.SelectedIndex)
        End If
    End If

    Dim graphString = jSerializer.Serialize(ObjList)
    ScriptManager.RegisterStartupScript(UpdatePanel1, Me.GetType(), "GraphFunction", "drawChart('" & graphString & "')", True)

End Sub

Javascript代码：

 function drawChart(graphInput) {
        //                                        var data = google.visualization.arrayToDataTable([
        //                      ['X', 'Points', 'Line'],
        //                      [3, 3.5, 1],
        //                      [4, 5.5, 2],
        //                      [4, 5, null],
        //                      [6.5, 7, 3],
        //                      [8, 12, 4],
        //                      [11, 14, 5]
        //                    ]);
        //  alert(1);
        // var data = JSON.parse('<%=jSerializer.Serialize(ObjList)%>');
        alert(graphInput);
        var data = JSON.parse(graphInput);
        alert(data);
        dLen = data.length;

        var tabledata = new google.visualization.DataTable();
  ...

有什么问题吗？我怎样才能在 javascript 中正确接收数据？

Answer 1

graphString 未初始化为字符串。您没有指定类型，因此假定为 Object。 jSerializer.Serialize(ObjList) 实际上 return 是一个字符串吗？如果是这样，请尝试将 graphString 初始化为正确的字符串：

Dim graphString As String = jSerializer.Serialize(ObjList).

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