/// <summary>
/// 添加总行数集合, 用于easyUI DataGrid绑定数据用
/// </summary>
/// <param name="dt">数据集</param>
/// <param name="totalCount">总行数</param>
/// <param name="footer"></param>
/// <returns></returns>
public static string DataTableToJson(DataTable dt, int totalCount, string footer)
{
try
{
StringBuilder strJson = new StringBuilder();
strJson.Append("{\"total\":");
strJson.Append(totalCount.ToString());
strJson.Append(",\"rows\":");
strJson.Append("[");
foreach (DataRow dr in dt.Rows)
{
strJson.Append(" {");
foreach (DataColumn item in dt.Columns)
{
strJson.Append("\"" + ConvertHepler.ConvertJson(item.ColumnName) + "\":");
if (Equals(dr[item.ColumnName], DBNull.Value))
{
strJson.Append("null");
}
else if (string.IsNullOrEmpty(dr[item.ColumnName].ToString()))
{
strJson.Append("\"\"");
}
else
{
strJson.Append("\"" + ConvertHepler.ConvertJson(dr[item.ColumnName].ToString()) + "\"");
}
strJson.Append(",");
}
strJson = new StringBuilder(strJson.ToString().TrimEnd(','));
strJson.Append("},");
}
return(strJson.ToString().TrimEnd(',') + "]" + footer + "}");
}
catch (Exception ex)
{
throw ex;
}
}
public static string ListToJson <T>(List <T> _list) where T : new()
{
StringBuilder strJson = new StringBuilder();
strJson.Append("{\"total\":");
strJson.Append(_list.Count.ToString());
strJson.Append(",\"rows\":");
strJson.Append("[");
Type type = typeof(T);
foreach (T _t in _list)
{
strJson.Append(" {");
foreach (PropertyInfo pi in type.GetProperties())
{
object _obj = pi.GetValue(_t, null);
string _val = "";
if (_obj == null)
{
_val = "";
}
else if (_obj.GetType() == typeof(DateTime))
{
_val = Convert.ToDateTime(_obj).ToString("yyyy-MM-dd HH:mm:ss");
}
else
{
_val = _obj.ToString();
}
strJson.Append("\"" + pi.Name + "\":");
strJson.Append("\"" + ConvertHepler.ConvertJson(_val) + "\"");
strJson.Append(",");
}
strJson = new StringBuilder(strJson.ToString().TrimEnd(','));
strJson.Append("},");
}
return(strJson.ToString().TrimEnd(',') + "]}");
}
public static string DictionaryToJson(Dictionary <string, string> list)
{
StringBuilder strJson = new StringBuilder();
strJson.Append("{");
foreach (KeyValuePair <string, string> item in list)
{
if (item.Value != null)
{
if (item.Value.Length > 0)
{
if (item.Value[0] == '[' || item.Value[0] == '{')
{
strJson.Append("\"" + item.Key + "\":" + item.Value + ",");
continue;
}
}
}
strJson.Append("\"" + item.Key + "\":" + "\"" + ConvertHepler.ConvertJson(item.Value) + "\",");
}
strJson = new StringBuilder(strJson.ToString().TrimEnd(','));
strJson.Append("}");
return(strJson.ToString());
}