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最新推荐文章于 2024-05-19 09:40:46 发布

转载最新推荐文章于 2024-05-19 09:40:46 发布 · 114 阅读

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本文介绍了ASP.NET中FindControl方法的功能及使用方式。该方法用于在当前命名容器中搜索指定ID的服务器控件，并返回该控件。如果找不到指定的控件，则返回null。FindControl方法适用于从代码隐藏文件中访问控件、访问容器内的控件或其他无法直接访问目标控件的情况。

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https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.control.findcontrol?view=netframework-4.7

FindControl(String)

Searches the current naming container for a server control with the specified id parameter.

public virtual System.Web.UI.Control FindControl (string id);

Parameters

String

The identifier for the control to be found.

Returns

Control

The specified control, or null if the specified control does not exist.

Remarks

Use FindControl to access a control from a function in a code-behind page, to access a control that is inside another container, or in other circumstances where the target control is not directly accessible to the caller.

This method will find a control only if the control is directly contained by the specified container; that is, the method does not search throughout a hierarchy of controls within controls.

For information about how to find a control when you do not know its immediate最接近的 container, see How to: Access Server Controls by ID.