在另一个窗口中设置编辑控件的文本
本文关键字：控件 文本 编辑 设置 另一个 窗口 | 更新日期: 2023-09-27 18:15:59
我试图以编程方式更改"另存为"对话框中编辑控件的文本。第一部分很简单——获取"另存为"窗口的句柄。但是找到编辑控件呢?可没那么容易。
无论如何，这是我目前为止用到的代码。谁能告诉我我哪里做错了?[DllImport("user32.dll")]
public static extern Int32 SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, String lParam);
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
IntPtr dialog = FindWindow(null, "Save As");
if (dialog.ToInt32() != 0)
{
IntPtr edit = FindWindowEx(dialog, IntPtr.Zero, "Edit", "");
SendMessage(edit, 0x000C /* WM_SETTEXT */, IntPtr.Zero, "...");
}
提前感谢!
是。这真的是一个复杂的问题。我花了一周的时间才使它可行，当我被分配到这个工作时。无论如何，我已经给出了下面的代码部分。使用该代码，您可以将文本设置为保存/打开对话框的编辑控件。不局限于这些任务，你可以做任何你想要的窗口，
请看一下。
public delegate int CallbackToFindChildWindow(int hWnd, int lParam);
private void AccessEditControlOfDialog()
{
IntPtr winHandle = IntPtr.Zero;
winHandle = GetActiveWindow();
const int NumberOfChars = 256;
string dialogCaption = string.Empty;
StringBuilder buff = new StringBuilder(NumberOfChars);
////Getting the caption of window..eg. Open/Save/Save as
if (GetWindowText((int)winHandle, buff, NumberOfChars) > 0)
{
dialogCaption = buff.ToString();
}
////Getting the ClassName of the Dialog Window handle
StringBuilder winClassName = new StringBuilder();
int numChars = GetClassName((IntPtr)winHandle, winClassName, winClassName.Capacity);
int targetControlWinHandle;
CallbackToFindChildWindow myCallBack = new CallbackToFindChildWindow(this.EnumChildGetValue);
////Find the window handle by using its caption
targetControlWinHandle = FindWindow(null, dialogCaption);
if (targetControlWinHandle == 0)
{
Logger.Error("No handle value is found in the Common Doalog");
}
else
{
EnumChildWindows(targetControlWinHandle, myCallBack, 0);
}
}
private int EnumChildGetValue(int handleWnd, int param)
{
StringBuilder controlWinClassName = new StringBuilder();
////Getting the ClassName of the Control Window handle
int numChars = GetClassName((IntPtr)handleWnd, controlWinClassName, controlWinClassName.Capacity);
if (controlWinClassName != null)
{
string text = "hi";
////For Normal Common Dialog box, the class name of Edit box is "Edit" which is for office 2007 "RichEdit20W"
if ((!string.Equals(controlWinClassName.ToString().Trim(), ""))
&& (controlWinClassName.ToString().Equals("Edit") || controlWinClassName.ToString().Equals("RichEdit20W")))
{
if (controlWinClassName.ToString().Equals("Edit"))
{
//// Set Text to the Edit box
SendMessage(handleWnd, WM_SETTEXT, text.Length, text);
}
else if (controlWinClassName.ToString().ToLower().Equals("richedit20w"))
{
SendMessage(handleWnd, WM_SETTEXT, 1, "");
////Set the path to the RichEdit20W Which is specially for office 2007 and winxp
this.SetRichEditText((IntPtr)handleWnd, text);
}
}
}
}
private void SetRichEditText(IntPtr handleWnd, string text)
{
try
{
const uint WM_USER = 0x0400;
SETTEXTEX setextex = new SETTEXTEX();
setextex.codepage = 1200;
setextex.flags = RTBW_FLAGS.RTBW_SELECTION;
IntPtr ptr = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(System.Runtime.InteropServices.Marshal.SizeOf(setextex.GetType()));
System.Runtime.InteropServices.Marshal.StructureToPtr(setextex, ptr, true);
IntPtr stringPtr = System.Runtime.InteropServices.Marshal.StringToBSTR(text);
int result = SendMessage((int)handleWnd, (int)WM_USER + 97, ptr.ToInt32(), text);
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(ptr);
System.Runtime.InteropServices.Marshal.FreeBSTR(stringPtr);
}
catch (Exception oEx)
{
Logger.Exception(oEx, "SetRichEditText");
throw;
}
}
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName, String lpWindowName);
[DllImport("User32.dll")]
public static extern Boolean EnumChildWindows(int hWndParent, Delegate lpEnumFunc, int lParam);
[DllImport("user32.dll")]
public static extern IntPtr GetActiveWindow();
[DllImport("User32.dll")]
public static extern Int32 GetWindowText(int hWnd, StringBuilder s, int nMaxCount);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
[DllImport("User32.dll")]
public static extern Int32 SendMessage(int hWnd, int Msg, int wParam, string lParam);
public const Int32 WM_SETTEXT = 0x000C;
[StructLayout(LayoutKind.Sequential)]
public struct SETTEXTEX
{
public ABC.FileSystemBrowser.CustomView.CommonEnum.RTBW_FLAGS flags;
public long codepage;
}
public enum RTBW_FLAGS
{
RTBW_DEFAULT = 0,
RTBW_KEEPUNDO = 1,
RTBW_SELECTION = 2
}
直接使用自动化界面。这就是它的作用。这是一句俏皮话。(一行很长，但还是一行)
using System.Windows.Automation;
(AutomationElement.RootElement
.FindFirst(TreeScope.Descendants,
new PropertyCondition(AutomationElement.NameProperty, "Save As"))
.FindFirst(TreeScope.Descendants,
new AndCondition(
new PropertyCondition(AutomationElement.NameProperty,
"File name:"),
new PropertyCondition(AutomationElement.ControlTypeProperty,
ControlType.Edit)))
.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern).SetValue("Booga");
这表示"从根开始，找到名称为"Save As"的第一个后代，然后找到名称为"File name:"的第一个后代，这是一个编辑控件，然后将值设置为"Booga"。
如果这是一个你自己用c#创建的保存对话框，你可以使用API来设置保存文件对话框的某些部分(例如标题，有效扩展名)，这能满足你的需要吗?
http://msdn.microsoft.com/en-us/library/system.windows.forms.savefiledialog.aspx我最终使用了Autoit DLL提供的功能，因为它简单高效。
但是另一个解决方案(和原生c#)是Md. Rashim Uddin的。