我有一个 c# 助手类，它声明了一个包含 javascript 函数名称的 javascript 组件。
new Button({Label = "Execute", OnClick = "ExecuteFunction"});
这应该会创建一个 json 文本：
{ label = "Execute", onClick = ExecuteFunction}
（其中 ExecuteFunction 是一个 javascript 函数）
servicestack-text 转 json 可以吗？
【问题讨论】：
这对于任何 JSON 序列化程序都是不可能的，因为这不是 valid JSON：
{ label = "Execute", onClick = ExecuteFunction}
最接近的有效 JSON 是：
{"label": "Execute", "onClick": "ExecuteFunction"}
在 JSON 中也没有 function 文字的概念，它只是一种数据格式，不要与 JavaScript 代码混淆。
【讨论】：
您可以使用 JSON.NET (Newtonsoft.JSON)。
但它仍然是无效的 JSON，因为这是一个 JavaScript 对象，而不是有效的 JavaScript 对象表示法。
因此，您需要邪恶的 eval，JSON.parse 不起作用。
从好的方面来说，eval 可能更快。
至于 ServiceStack.NET：当您忽略所有功能和向后兼容性（例如 .NET 2.0）时，很容易变得快速。
代码：
namespace JQuery.Plugins.SlickGrid
{
// Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaargh, invalid JSON
public class FunctionNameConverter : Newtonsoft.Json.JsonConverter
{
public override void WriteJson(Newtonsoft.Json.JsonWriter writer
, object value, Newtonsoft.Json.JsonSerializer serializer)
{
string jsfn = (string)value;
writer.WriteRawValue(jsfn);
} // End Sub WriteJson
public override object ReadJson(Newtonsoft.Json.JsonReader reader, System.Type objectType
, object existingValue, Newtonsoft.Json.JsonSerializer serializer)
{
throw new System.NotImplementedException();
} // End Function ReadJson
public override bool CanConvert(System.Type objectType)
{
return object.ReferenceEquals(typeof(string), objectType);
} // End Function CanConvert
} // End Class FunctionNameConverter
} // End Namespace JQuery.Plugins.SlickGrid
这里有一个用法示例：
namespace JQuery.Plugins.SlickGrid
{
public class cSlickGrid
{
// public List<object> data
// public System.Data.DataTable data
protected string m_strLanguage = null;
protected System.Collections.Generic.List<JQuery.Plugins.SlickGrid.cColumn> m_columns;
protected System.Collections.IList m_List;
protected System.Data.DataTable m_dt;
public object data
{
get
{
if (m_List != null)
{
return m_List;
}
return m_dt;
}
set
{
if (value == null)
{
m_List = null;
m_dt = null;
return;
}
System.Type tValueType = value.GetType();
if (object.ReferenceEquals(tValueType, typeof(System.Data.DataTable)))
{
m_dt = (System.Data.DataTable)value;
return;
}
if (IsGenericList(value) || object.ReferenceEquals(tValueType, typeof(System.Collections.IList)))
{
m_List = (System.Collections.IList)value;
return;
}
throw new System.NotImplementedException("cSlickGrid property data: Support for this type not implemented. Only supports DataTable or IList at the moment.");
}
} // data
protected bool IsGenericList(object obj)
{
if (obj == null)
{
throw new System.ArgumentNullException("obj");
} // (obj == null)
return IsGenericList(obj.GetType());
} // IsGenericList
protected bool IsGenericList(System.Type tObjectType)
{
if (tObjectType == null)
{
throw new System.ArgumentNullException("type");
} // (tObjectType == null)
foreach (System.Type @interface in tObjectType.GetInterfaces())
{
if (@interface.IsGenericType)
{
if (object.ReferenceEquals(@interface.GetGenericTypeDefinition(), typeof(System.Collections.Generic.ICollection<>)))
{
// if needed, you can also return the type used as generic argument
return true;
} // Object.ReferenceEquals([interface].GetGenericTypeDefinition(), GetType(ICollection(Of )))
} // (@interface.IsGenericType)
}
return false;
} // IsGenericList
public System.Collections.Generic.List<JQuery.Plugins.SlickGrid.cColumn> columns
{
get { return m_columns; }
set
{
foreach (JQuery.Plugins.SlickGrid.cColumn SlickGridColumn in value)
{
if (SlickGridColumn.formatter != null && SlickGridColumn.formatter == "Slick.Formatters.Date")
{
if (string.IsNullOrEmpty(m_strLanguage))
{
throw new System.NullReferenceException("m_strLanguage is NULL. Please set the language in the constructor.");
}
else
{
SlickGridColumn.formatter = "Slick.Formatters.Date_" + m_strLanguage;
}
}
}
m_columns = value;
}
}
public cSlickGrid()
{
}
//Public Sub New(strLanguage As String, lsData As List(Of Object), lsColumns As List(Of JQuery.Plugins.SlickGrid.cColumn))
public cSlickGrid(string strLanguage, object objData, System.Collections.Generic.List<JQuery.Plugins.SlickGrid.cColumn> lsColumns)
{
if (string.IsNullOrEmpty(strLanguage))
{
throw new System.Data.NoNullAllowedException("strLanguage may not be NULL.");
}
this.m_strLanguage = strLanguage.ToUpper();
//Me.data = lsData
this.data = objData;
this.columns = lsColumns;
}
} // cSlickGrid
// various partial sources
// http://www.developerfusion.com/project/18821/slickgrid/
// jQuery.Plugins.SlickGrid.cOptions
public class cOptions
{
public bool asyncEditorLoading = true;
public bool autoEdit = true;
public bool autoHeight = true;
public short defaultColumnWidth = 80;
public bool editable = true;
public bool editOnDoubleClick = false;
public bool enableAddRow = false;
public bool enableCellNavigation = true;
public bool enableCellRangeSelection = true;
public bool enableColumnReorder = true;
public bool forceFitColumns = false;
public bool leaveSpaceForNewRows = true;
public bool manualScrolling = false;
public bool multiSelect = true;
public bool rerenderOnResize = true;
public int secondaryHeaderRowHeight = 25;
} // cOptions
// http://www.java2s.com/Open-Source/ASP.NET/Framework/lucilla/Lucilla/Framework/Web/Builders/SlickGrid/Column.cs.htm
// jQuery.Plugins.SlickGrid.cColumn
public class cColumn
{
public cColumn()
{
}
public cColumn(string strID, string strName, string strField)
{
this.id = strID;
this.name = strName;
this.field = strField;
}
public string id = null;
// Column ID.
public string name = "";
// Column name to put in the header.
public string toolTip = null;
// Tooltip (if different from name).
public string field = null;
// Property of the data context to bind to.
[Newtonsoft.Json.JsonProperty(), Newtonsoft.Json.JsonConverter(typeof(FunctionNameConverter))]
public string formatter = null;
// (default 'return value || ""') Function responsible for rendering the contents of a cell. Signature: function formatter(row, cell, value, columnDef, dataContext) { ... return "..."; }
[Newtonsoft.Json.JsonProperty(), Newtonsoft.Json.JsonConverter(typeof(FunctionNameConverter))]
public string editor = null;
// An WithEditorFunction class.
[Newtonsoft.Json.JsonProperty(), Newtonsoft.Json.JsonConverter(typeof(FunctionNameConverter))]
public string validator = null;
// An extra validation function to be passed to the editor.
public bool? unselectable = null;
// If true, the cell cannot be selected (and therefore edited).
public bool? cannotTriggerInsert = null;
// If true, a new row cannot be created from just the value of this cell.
[Newtonsoft.Json.JsonProperty(), Newtonsoft.Json.JsonConverter(typeof(FunctionNameConverter))]
public string setValueHandler = null;
// If true, this handler will be called to set field value instead of context[field].
public short? width = null;
// Width of the column in pixels.
public bool? resizable = null;
// (default true) If false, the column cannot be resized.
public bool? sortable = null;
// (default false) If true, the column can be sorted (onSort will be called).
public short? minWidth = null;
// Minimum allowed column width for resizing.
public short? maxWidth = null;
// Maximum allowed column width for resizing.
public string cssClass = null;
// A CSS class to add to the cell.
public string headerCssClass = null;
// A CSS class to add to the cell.
public bool? rerenderOnResize = null;
// Rerender the column when it is resized (useful for columns relying on cell width or adaptive formatters).
[Newtonsoft.Json.JsonProperty(), Newtonsoft.Json.JsonConverter(typeof(FunctionNameConverter))]
public string asyncPostRender = null;
// Function responsible for manipulating the cell DOM node after it has been rendered (called in the background).
public string behavior = null;
// Configures the column with one of several available predefined behaviors: "select", "move", "selectAndMove".
} // cColumn
public class RLExtends
{
public static void translateHeader(System.Data.DataTable pData, System.Data.DataTable pHeader, string pLanguageField)
{
if ((pData != null) && (pHeader != null))
{
for (int tC = pData.Columns.Count - 1; tC >= 0; tC += -1)
{
System.Data.DataColumn tColumn = pData.Columns[tC];
if (tColumn.ColumnName.StartsWith("x_"))
pData.Columns.RemoveAt(tC);
if (tColumn.ColumnName.StartsWith("h"))
{
string tH = tColumn.ColumnName.Split(';')[0].Remove(0, 1);
int itH = int.Parse(tH);
if (itH < pHeader.Rows.Count && pHeader.Columns.Contains(pLanguageField))
{
string tName = System.Convert.ToString(pHeader.Rows[itH][pLanguageField]);
tColumn.Caption = tColumn.ColumnName;
tColumn.ColumnName = !pData.Columns.Contains(tName) ? tName : tName + " (" + tC.ToString() + ")";
}
else
{
tColumn.Caption = tColumn.ColumnName;
tColumn.ColumnName = string.Format("404: (h: {0}, c: {1}, l: {2})", tH, tC, pLanguageField);
}
}
}
}
}
public static System.Collections.Generic.List<SlickGrid.cColumn> dataToColumns(System.Data.DataTable pData)
{
System.Collections.Generic.List<SlickGrid.cColumn> tColumns = new System.Collections.Generic.List<SlickGrid.cColumn>();
// Fix - pData = NULL error, 07.03.2014, sts
if (pData != null)
{
foreach (System.Data.DataColumn tColumn in pData.Columns)
{
string[] tValue = tColumn.Caption.Split(';');
if (!tColumn.ColumnName.StartsWith("x_") && tValue.Length >= 3)
{
string tField = tColumn.ColumnName;
string tFormatter = null;
short tWidth = System.Convert.ToInt16(tValue[1]);
if (!string.IsNullOrEmpty(tValue[2]))
tFormatter = tValue[2];
string tHCSS = tValue.Length > 3 ? tValue[3] : string.Empty;
string tCSS = tValue.Length > 4 ? tValue[4] : tHCSS;
tColumns.Add(new SlickGrid.cColumn
{
id = tColumn.ColumnName,
name = tField,
field = tColumn.ColumnName,
formatter = tFormatter,
sortable = true,
maxWidth = tWidth,
width = tWidth,
cssClass = tCSS,
headerCssClass = tHCSS
});
}
}
}
return tColumns;
}
public static System.Collections.Generic.List<SlickGrid.cColumn> dataToColumnsAny(System.Data.DataTable pData)
{
System.Collections.Generic.List<SlickGrid.cColumn> tColumns = new System.Collections.Generic.List<SlickGrid.cColumn>();
foreach (System.Data.DataColumn tColumn in pData.Columns)
{
string[] tValue = tColumn.Caption.Split(';');
if (!tColumn.ColumnName.StartsWith("x_") && tValue.Length >= 3)
{
tColumn.ColumnName = tValue[0];
if (tColumn.ColumnName.StartsWith("r_"))
{
if (pData.Rows.Count == 0 || (pData.Rows.Count > 0 && pData.Rows[0].IsNull(tColumn) ))
{
continue;
}
else
{
tColumn.ColumnName = tValue[0].Substring(2);
}
}
string tFormatter = null;
short tWidth = System.Convert.ToInt16(tValue[1]);
short tMinWidth = 30;
string tV = tValue.Length > 5 ? tValue[5] : string.Empty;
int bla;
if (int.TryParse(tV, out bla))
tMinWidth = System.Convert.ToInt16(tV);
if (!string.IsNullOrEmpty(tValue[2]))
tFormatter = tValue[2];
string tHCSS = tValue.Length > 3 ? tValue[3] : string.Empty;
string tCSS = tValue.Length > 4 ? tValue[4] : tHCSS;
string tTooltip = tValue.Length > 6 ? tValue[6] : string.Empty;
tColumns.Add(new SlickGrid.cColumn
{
id = tColumn.ColumnName,
name = tColumn.ColumnName,
field = tColumn.ColumnName,
formatter = tFormatter,
sortable = true,
minWidth = tMinWidth,
maxWidth = tWidth,
width = tWidth,
cssClass = tCSS,
headerCssClass = tHCSS,
toolTip = tTooltip
});
}
}
return tColumns;
}
public static string toJSON(System.Data.DataTable pData
, System.Collections.Generic.List<JQuery.Plugins.SlickGrid.cColumn> pColumns
, string pLanguage = "en")
{
cSlickGrid tGrid = new cSlickGrid(pLanguage, pData, pColumns);
return Serialize(tGrid);
}
public static string toJSON(System.Data.DataTable pData, System.Data.DataTable pHeader, string pLanguageField, string pLanguage = "en")
{
RLExtends.translateHeader(pData, pHeader, pLanguageField);
System.Collections.Generic.List<JQuery.Plugins.SlickGrid.cColumn> tColumns = RLExtends.dataToColumns(pData);
return RLExtends.toJSON(pData, tColumns);
}
public static string Serialize(object obj)
{
return Newtonsoft.Json.JsonConvert.SerializeObject(obj);
}
}
} // End Namespace jQuery.SlickGrid
【讨论】：