DataSet转换成Json格式

/// <summary>
/// DataSet转换成Json格式
/// </summary>
/// <paramname="ds">DataSet</param>
///<returns></returns>
public static string DatasetToJson(DataSet ds, int total = -1)
{
StringBuilder json = new StringBuilder();

foreach (DataTable dt in ds.Tables)
{
//{"total":5,"rows":[
json.Append("{\"total\":");
if (total == -1)
{
json.Append(dt.Rows.Count);
}
else
{
json.Append(total);
}
json.Append(",\"rows\":[");
json.Append(DataTableToJson(dt));
json.Append("]}");
}
return json.ToString();
}

 

/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <paramname="dt"></param>
///<returns></returns>
public static string DataTableToJson(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();

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("\",");
}
if (dt.Columns.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}
jsonBuilder.Append("},");
}
if (dt.Rows.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}

return jsonBuilder.ToString();
}