public class DataTableToJson
{
/// <summary>
/// 把DataTable 转换为json格式数据，以方便JavaScript接受
/// </summary>
/// <param name="dt">datatable 对象</param>
/// <returns>string</returns>
public string GetJsonData(DataTable dt)
{
if (dt != null)
{
StringBuilder html = new StringBuilder();
html .Append("[");
for (int i = 0; i < dt .Rows .Count; i++)
{
html .Append("{");
for (int j = 0; j < dt .Columns .Count; j++)
{
html .Append("\"" + dt .Columns[j] .ColumnName + "\"");
html .Append(":");
html .Append("\"" + string2Json(dt .Rows[i][j] .ToString()) + "\"");
html .Append(",");
}
html .Remove(html .Length - 1 , 1);
html .Append("},");
}
html .Remove(html .Length - 1 , 1);
html .Append("]");
return html .ToString();
}
else
{
return "";
}
}
/// <summary>
/// 把字符串转化为json对象
/// </summary>
/// <param name="s">字符串</param>
/// <returns>string</returns>
private string string2Json(string s)
{
StringBuilder sb = new StringBuilder(s .Length + 20);
//字符串的char数组
char[] charArray = s .ToCharArray();
for (int i = 0; i < charArray .Length; i++)
{
char c = charArray[i];
switch (c)
{
case '\"':
sb .Append("\\\"");
break;
case '\\':
sb .Append("\\\\");
break;
case '/':
sb .Append("\\/");
break;
case '\b':
sb .Append("\\b");
break;
case '\f':
sb .Append("\\f");
break;
case '\n':
sb .Append("\\n");
break;
case '\r':
sb .Append("\\r");
break;
case '\t':
sb .Append("\\t");
break;
default:
sb .Append(c);
break;
}
}
return sb .ToString();
}
}
