利用API给其它线程的各种控件赋值代码,CSharp代码库,德仔网

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【CSharp】利用API给其它线程的各种控件赋值
作者:dezai / 发布于2014/1/26/ 336
[DllImport("User32.dll",EntryPoint="SendMessage")]
publicstaticexternintSendMessage(IntPtrhWnd,intMsg,IntPtrwParam,stringlParam);

[DllImport("user32.dll")]
publicstaticexternIntPtrSendMessage(IntPtrhWnd,intMsg,intwParam,
intlParam);

//为可输入控件赋值
constintWM_SETTEXT=0x000C;
//SendMessage((IntPtr)hwnd,WM_SETTEXT,(IntPtr)0,"123");

//模拟单击
constintWM_CLICK=0x00F5;
//SendMessage((IntPtr)hwnd,WM_CLICK,(IntPtr)0,"0");

//为下拉控件赋值
constintWM_CLICK2=0x014D;
//SendMessage((IntPtr)hwnd,WM_CLICK2,(IntPtr)0,"123");

//向下拉控件添加值
constintWM_CLICK3=0x0180;
//SendMessage((IntPtr)hwnd,WM_CLICK3,(IntPtr)0,"123");

//展开日期下拉
constintwm_syskeydown=0x0104,vk_down=0x28;
//SendMessage((IntPtr)hwnd,wm_syskeydown,vk_down,0);



//为下拉列表和TreeView赋值

 public class TreeApi
 {
 #region "API函数定义 "
 [DllImport("user32.dll ", CharSet = CharSet.Unicode)]
 private static extern int SendMessage(int hWnd, int msg, IntPtr wParam, IntPtr lparam);
 [DllImport("user32.dll ", CharSet = CharSet.Unicode)]
 private static extern int SendMessage(int hWnd, int msg, IntPtr wParam, TVITEM lparam);
 [DllImport("user32.dll ")]
 public static extern int GetWindowText(int hWnd, StringBuilder lpString, int nMaxCount);
 [DllImport("user32.dll ")]

 public static extern int GetClassNameA(int hwnd, StringBuilder lpClassName, int nMaxCount);
 [DllImport("kernel32 ", CharSet = CharSet.Unicode)]
 public static extern int CopyMemory(StringBuilder Destination, IntPtr Source, int Length);
 [DllImport("kernel32 ", CharSet = CharSet.Unicode)]
 public static extern int GlobalAlloc(int wFlags, int dwBytes);
 [DllImport("kernel32 ", CharSet = CharSet.Unicode)]
 public static extern int GlobalFree(IntPtr hMem);
 #endregion

 #region "常量定义 "
 private const int TVGN_CARET = 0x00000009;
 private const int TVM_SELECTITEM = 0x0000110b;
 private const int TVGN_ROOT = 0x00000000;
 private const int TVM_GETNEXTITEM = 0x0000110a;
 private const int TVIF_TEXT = 0x0001;
 private const int TVGN_NEXT = 0x00000001;
 private const int TVM_GETITEM = 0x0000110c;
 private const int TVGN_CHILD = 0x00000004;
 private const int GMEM_FIXED = 0x0000;
 private const int TV_FIRST = 0x1100;// TreeView messages
 private const int TVM_DELETEITEM = (TV_FIRST + 1);
 private const int WM_CLICK = 0x00F5;
 private const int TVM_GETITEMRECT = (TV_FIRST + 4);
 #endregion

/// <summary>
 /// 选取TreeView指定项
 /// </summary>
 /// <param name= "TreeViewHwnd "> 树对象句柄 </param>
 /// <param name= "ItemHwnd "> 节点对象句柄 </param>
 /// <returns> 成功选中返回true 没找到返回false </returns>
 public static bool SelectNode(IntPtr TreeViewHwnd, IntPtr ItemHwnd)
 {
 int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_SELECTITEM, new IntPtr(TVGN_CARET), ItemHwnd);
 if (result == 0)
 {
 return false;
 }
 else
 {
 return true;
 }
 }
 /// <summary>
 /// 获取TreeView根节点
 /// </summary>
 /// <param name= "TreeViewHwnd "> 树对象句柄 </param>
 /// <returns> 成功返回根节点句柄 否则返回 0 </returns>
 public static IntPtr GetRoot(IntPtr TreeViewHwnd)
 {
 TVITEM tv = new TVITEM();
 IntPtr hStr = Marshal.AllocHGlobal(1024);
 tv.hItem = TreeViewHwnd;
 tv.mask = TVIF_TEXT;
 tv.pszText = hStr;
 tv.cchTextMax = 1024;
 int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_ROOT), tv);
 Marshal.FreeHGlobal(hStr);
 return new IntPtr(result);
 }
 /// <summary>
 /// 获取同级下一节点句柄
 /// </summary>
 /// <param name= "TreeViewHwnd "> 树对象句柄 </param>
 /// <param name= "PrevHwnd "> 上一项节点句柄 </param>
 /// <returns> 成功返回下一项节点句柄 否则返回 0 </returns>
 public static IntPtr GetNextItem(IntPtr TreeViewHwnd, IntPtr PrevHwnd)
 {
 int mbHwnd = 0;
 mbHwnd = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_NEXT), PrevHwnd);
 return new IntPtr(mbHwnd);
 }
 /// <summary>
 /// 获取第一个子节点句柄
 /// </summary>
 /// <param name= "TreeViewHwnd "> 树对象句柄 </param>
 /// <param name= "ParentHwnd "> 父节点句柄 </param>
 /// <returns> 成功返回第一个子节点句柄 否则返回 0 </returns>
 public static IntPtr GetFirstChildItem(IntPtr TreeViewHwnd, IntPtr ParentHwnd)
 {
 int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_CHILD), ParentHwnd);
 return new IntPtr(result);
 }
 /// <summary>
 /// 获取指定项文本
 /// </summary>
 /// <param name= "TreeViewHwnd "> 树对象句柄 </param>
 /// <param name= "ItemHwnd "> 节点句柄 </param>
 /// <returns> </returns>
 public static string GetItemText(IntPtr TreeViewHwnd, IntPtr ItemHwnd)
 {
 IntPtr hStr = Marshal.AllocHGlobal(1024);
 TVITEM tv = new TVITEM();
 tv.hItem = ItemHwnd;
 tv.mask = TVIF_TEXT;
 tv.pszText = hStr;
 tv.cchTextMax = 1024;
 StringBuilder sb = new StringBuilder(1024);
 int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETITEM, new IntPtr(0), tv);
 int iCopy = CopyMemory(sb, hStr, 1024);
 Marshal.FreeHGlobal(hStr);
 return sb.ToString();
 }
 /// <summary>
 /// TV_ITEM结构
 /// </summary>
 [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
 public class TVITEM
 {
 public int mask;
 public IntPtr hItem;
 public int state;
 public int stateMask;
 public IntPtr pszText;
 public int cchTextMax;
 public int iImage;
 public int iSelectedImage;
 public int cChildren;
 public IntPtr lParam;
 public int HTreeItem;
 }
 }
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