Dynamic Web TWAIN是一個(gè)專為Web應(yīng)用程序設(shè)計(jì)的TWAIN掃描識(shí)別控件。你只需在TWAIN接口寫幾行代碼，就可以用兼容TWAIN的掃描儀掃描文檔或從數(shù)碼相機(jī)/采集卡中獲取圖像。然后用戶可以編輯圖像并將圖像保存為多種格式，用戶可保存圖像到遠(yuǎn)程數(shù)據(jù)庫(kù)或者SharePoint。該TWAIN控件還支持上傳和處理本地圖像。

本文匯集了一些Dynamic Web TWAIN編程方面的常見(jiàn)問(wèn)題，并且針對(duì)這些問(wèn)題進(jìn)行了回答，感興趣的朋友快來(lái)了解一下吧~

點(diǎn)擊下載Dynamic Web TWAIN正式版

問(wèn)題1：如何在不顯示設(shè)備選擇對(duì)話框的情況下選擇設(shè)備？

答：代碼如下：

DWObject.OpenSourceManager();.OpenSourceManager();

for(i = 0, i<=DWObject.SourceCount - 1,i++){for(i = 0, i<=DWObject.SourceCount - 1,i++){
    if (DWObject.GetSourceNameItems(i) == "Specified device name")if (DWObject.GetSourceNameItems(i) == "Specified device name")
        DWObject.SelectSourceByIndex (i);DWObject.SelectSourceByIndex (i);
}}

//if can't find the specified source, it'll select default source//if can't find the specified source, it'll select default source
DWObject.AcquireImage(); DWObject.AcquireImage(); 

問(wèn)題2：在沒(méi)有UI的情況下獲取圖像時(shí)如何禁用進(jìn)度指示器對(duì)話框？

答：代碼如下：

DWObject.IfShowUI = false;.IfShowUI = false;
DWObject.IfDisableSourceAfterAcquire = true;DWObject.IfDisableSourceAfterAcquire = true;
DWObject.OpenSource();DWObject.OpenSource();
DWObject.IfShowIndicator = false;DWObject.IfShowIndicator = false;
DWObject.AcquireImage();DWObject.AcquireImage();

問(wèn)題3：如何分別設(shè)置水平和垂直分辨率？

答：代碼如下：

DWObject.SelectSource();.SelectSource();
DWObject.OpenSource();DWObject.OpenSource();

//Set XRESOLUTION current value.//Set XRESOLUTION current value.
DWObject.Capability = 0x1118; //ICAP_XRESOLUTIONDWObject.Capability = 0x1118; //ICAP_XRESOLUTION
DWObject.CapType = 5; //TWON_ONEVALUEDWObject.CapType = 5; //TWON_ONEVALUE
DWObject.CapValue = 300;DWObject.CapValue = 300;
if (DWObject.CapSet == false){if (DWObject.CapSet == false){
    alert( "Failed to set the x-resolution. " + DWObject.ErrorString);( "Failed to set the x-resolution. " + DWObject.ErrorString);
}}

//Set YRESOLUTION current value.//Set YRESOLUTION current value.
DWObject.Capability = 0x1119; //ICAP_YRESOLUTIONDWObject.Capability = 0x1119; //ICAP_YRESOLUTION
DWObject.CapType = 5; //TWON_ONEVALUEDWObject.CapType = 5; //TWON_ONEVALUE
DWObject.CapValue = 200;DWObject.CapValue = 200;
if (DWObject.CapSet == false){if (DWObject.CapSet == false){
   alert( "Failed to set the y-resolution." + DWObject.ErrorString);( "Failed to set the y-resolution." + DWObject.ErrorString);
}}

DWObject.AcquireImage();DWObject.AcquireImage();

相關(guān)內(nèi)容推薦：

Dynamic Web TWAIN常見(jiàn)問(wèn)題（一）：如何選擇使用哪個(gè)版本？
Dynamic Web TWAIN常見(jiàn)問(wèn)題（二）：相比其他的TWAIN SDK，主要優(yōu)勢(shì)是什么？
Dynamic Web TWAIN常見(jiàn)問(wèn)題（三）：Dynamic Web TWAIN將使用哪些操作系統(tǒng)？
Dynamic Web TWAIN常見(jiàn)問(wèn)題（四）：編程問(wèn)題-沒(méi)有用戶界面怎么工作？