在SharePoint事件接收器中下载文档 [英] Download document in SharePoint event receiver

问题描述

大家好，

你能指导我吗？我想在文档库中编写一个事件接收器。上传文件后应立即触发事件。我需要为其他一些活动下载上传的文件。

我怎么能这样做？

谢谢&问候

Poomani Sankaran

解决方案

Hi Poomani，

<我们可以为文档库创建一个事件接收器，然后在ItemAdded方法中将上传文档下载到服务器中的文件夹中。以下代码供您参考。

以下代码供您参考。 
 public override void ItemAdded（SPItemEventProperties properties）
 {
 if（properties.ListItem.File.Length == 0）
 {
 System.Threading.Thread.Sleep （2000）; 
 
 //由于我们的项存在，运行GetItemById来实例化一个新的和更新的SPListItem对象
 var spFile = properties.List.GetItemById（properties.ListItemId）; 
 while（spFile.File.LockType！= SPFile.SPLockType.None）
 {
 System.Threading.Thread.Sleep（2000）; 
 spFile = properties.List.GetItemById（properties.ListItemId）; 
 //我们需要检查文件是否存在，否则如果有人决定取消上传
 if（！spFile.File.Exists）
 return，它将永远循环; 
} 
 SPFile file = spFile.File; 
 byte [] bArray = file.OpenBinary（）; 
 string filePath = Path.Combine（" c：\\ temp \\ download"，file.Name）; 
 //打开文件流并使用（FileStream fs = new FileStream（filePath，FileMode.Create，FileAccess.ReadWrite））写入
文件
 {
 fs.Write（ bArray，0，bArray.Length）; 
} 
} 
 else 
 {
 SPFile file = properties.ListItem.File; 
 byte [] bArray = file.OpenBinary（）; 
 string filePath = Path.Combine（" c：\\ temp \\ download"，file.Name）; 
 //打开文件流并使用（FileStream fs = new FileStream（filePath，FileMode.Create，FileAccess.ReadWrite））写入
文件
 {
 fs.Write（ bArray，0，bArray.Length）; 
} 
 
} 
} 
 

最诚挚的问候，

丹尼斯

Hi All,

Could you please guide me? I want to write a event receiver in document library. Event should fire immediate after upload document. I need to download the uploaded document for some other activities.

How could i do it?

Thanks & Regards

Poomani Sankaran

解决方案

Hi Poomani,

We can create an event receiver for document library, and then download the upload document to a folder in server in ItemAdded method. The following code for your reference.

The following code for your reference.
public override void ItemAdded(SPItemEventProperties properties)
{
	if (properties.ListItem.File.Length == 0)
	{
		System.Threading.Thread.Sleep(2000);

		//Since our item exists, run the GetItemById to instantiate a new  and updated SPListItem object 
		var spFile = properties.List.GetItemById(properties.ListItemId);
		while (spFile.File.LockType != SPFile.SPLockType.None)
		{
			System.Threading.Thread.Sleep(2000);
			spFile = properties.List.GetItemById(properties.ListItemId);
			//We need to check if the file exists, otherwise it will loop forever if someone decides to cancel the upload
			if (!spFile.File.Exists)
				return;
		}
		SPFile file = spFile.File;
		byte[] bArray = file.OpenBinary();
		string filePath = Path.Combine("c:\\temp\\download", file.Name);
		//open the file stream and write the file
		using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite))
		{
			fs.Write(bArray, 0, bArray.Length);
		}
	}
	else
	{
		SPFile file = properties.ListItem.File;
		byte[] bArray = file.OpenBinary();
		string filePath = Path.Combine("c:\\temp\\download", file.Name);
		//open the file stream and write the file
		using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite))
		{
			fs.Write(bArray, 0, bArray.Length);
		}
		
	}
}

Best Regards,

Dennis

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