最后的格式为:[{},{},...]
StringBuilder DataTableToJSON(DataTable dt)
{
string columnName;
StringBuilder builder = new StringBuilder();
if (dt != null)
{
builder.Append("[");
for (int i = 0; i < dt.Rows.Count; i++)
{
builder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
columnName = dt.Columns[j].ColumnName;
builder.Append("\"" + columnName + "\":");
builder.Append("\"" + dt.Rows[i][columnName] + "\",");
}
builder.Append("},");
}
builder.Append("]");
builder = builder.Replace(",}", "}").Replace(",]", "]"); //去掉最后面多余的逗号
}
return builder;
}