ScanApiGetQrCodeAsync 方法

[ApiBindAttribute(PlatformType.WeChat_OfficialAccount, "ScanApi.GetQrCodeAsync", 
	true)]
public static Task<ProductGetQrCodeJsonResult> GetQrCodeAsync(
	string accessTokenOrAppId,
	string keystr,
	string extinfo = null,
	string keystandard = "ean13",
	int qrcode_size = 100,
	int timeOut = 10000
)

<ApiBindAttribute(PlatformType.WeChat_OfficialAccount, "ScanApi.GetQrCodeAsync", 
	true)>
Public Shared Function GetQrCodeAsync ( 
	accessTokenOrAppId As String,
	keystr As String,
	Optional extinfo As String = Nothing,
	Optional keystandard As String = "ean13",
	Optional qrcode_size As Integer = 100,
	Optional timeOut As Integer = 10000
) As Task(Of ProductGetQrCodeJsonResult)