/// <summary>
/// datatable转化为JSON
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public string DataTableJson(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("{\"");
jsonBuilder.Append(dt.TableName.ToString());
jsonBuilder.Append("\":[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
/// <summary>
/// list集合转化为JSON
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string toJson(List<string> str)
{
StringBuilder json = new StringBuilder();
if (str == null)
{
return "null";
}
json.Append("[");
foreach (var item in str)
{
json.Append("{\"Name\":\"");
json.Append(item);
json.Append("\"},");
}
return json.ToString().Substring(0, json.ToString().LastIndexOf(",")) + "]";
}
/// <summary>
/// 将二维数组转化为json
/// </summary>
private void arrayToJson(string[,] array)
{
StringBuilder Json=new StringBuilder();
int num = 0;
string temp = "";
Json.Append("[{");
for (int i = 0; i < 3;i++ )
{
num = i;
temp = turnToJson(array[i, 0], array[i, 1]);
Json.Append( temp );
if (i != 2)
Json.Append(",");
}
Json.Append("}]");
}
/// ///将传入的两个字符串转换为json中键值对的形式 /// private string turnToJson(string str1,string str2) { string json = “”; json+=”\”“; json += str1 + “\”:\”“; json += str2 + “\”“; return json; }
/// <summary>
/// json转为datatable
/// </summary>
/// <param name="strJson"></param>
/// <returns></returns>
private DataTable JsonToDataTable(string strJson)
{
//转换json格式
strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();
//取出表名
var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
string strName = rg.Match(strJson).Value;
DataTable tb = null;
//去除表名
strJson = strJson.Substring(strJson.IndexOf("[") + 1);
strJson = strJson.Substring(0, strJson.IndexOf("]"));
//获取数据
rg = new Regex(@"(?<={)[^}]+(?=})");
MatchCollection mc = rg.Matches(strJson);
for (int i = 0; i < mc.Count; i++)
{
string strRow = mc[i].Value;
string[] strRows = strRow.Split('*');
//创建表
if (tb == null)
{
tb = new DataTable();
tb.TableName = strName;
foreach (string str in strRows)
{
var dc = new DataColumn();
string[] strCell = str.Split('#');
if (strCell[0].Substring(0, 1) == "\"")
{
int a = strCell[0].Length;
dc.ColumnName = strCell[0].Substring(1, a - 2);
}
else
{
dc.ColumnName = strCell[0];
}
tb.Columns.Add(dc);
}
tb.AcceptChanges();
}
//增加内容
DataRow dr = tb.NewRow();
for (int r = 0; r < strRows.Length; r++)
{
dr[r] = strRows[r].Split('#')[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
return tb;
}
