TreeView问题: 当我们鼠标选中一个Node时,只有一种难看的蓝色,请问能够让选中的Node添加其他颜色或不要颜色吗

[machunyanlengxue]

TreeView问题: 当我们鼠标选中一个Node时,只有一种难看的蓝色,请问能够让选中的Node添加其他颜色或不要颜色吗

[machunyanlengxue]

我是在03里做的


哪位好心朋友帮帮小妹我啊


我急着交工呢

[JoineChoi]

继承TreeView控件，重绘一下。

[JoineChoi]

using System;
using System.Windows.Forms;
using System.Drawing;

namespace WindowsApplication1
{
    public partial class myTreeView : TreeView
    {
        public myTreeView()
        {
            _SelectNodeColor = Color.Blue;
            _SelectNodeFont = this.Font;
        }

        // 所选节点的文本颜色
        Color _SelectNodeColor;
        public Color SelectNodeColor
        {
            get { return _SelectNodeColor; }
            set { _SelectNodeColor = value; }
        }

        //所选节点的文本字体
        Font _SelectNodeFont;
        public Font SelectNodeFont
        {
            get { return _SelectNodeFont; }
            set { _SelectNodeFont = value; }
        }

        //前一个选择的节点还原显示效果
        protected override void OnBeforeSelect(TreeViewCancelEventArgs e)
        {
            TreeNode node = e.Node.TreeView.SelectedNode;

            if (node != null)
            {
                node.ForeColor = this.ForeColor;
                node.NodeFont = this.Font;
            }
        }

        //设置选择的节点的显示效果
        protected override void OnAfterSelect(TreeViewEventArgs e)
        {
            e.Node.ForeColor = _SelectNodeColor;
            e.Node.NodeFont=_SelectNodeFont;
        }

        //去掉焦点框。（还是会闪一下的，要真正不要焦点，需要栏截API，开销太大了）
        protected override void OnGotFocus(EventArgs e)
        {
            this.Parent.SelectNextControl(this, true, false, true, true);
        }
    }
}

[machunyanlengxue]

怎么重绘一下啊

能具体点吗

[machunyanlengxue]

谁告诉我应该怎么做啊

[JoineChoi]

那你用　System.Windowns.Forms.TreeView
这样它的命名空间就明确了。

[JoineChoi]

你新建一个项目，然后再新建一个类，把上面的代码全部代替这个类原来自动生成的代码（命名空间WindowsApplication1改为和你项目一样的命名空间）。然后编译一下，在工具栏的最上方就会出现这个myTreeView，你拉进来试一下

[machunyanlengxue]

TreeViewCancelEventArgs 和　TreeViewEventArgs 在什么命名空间啊

[machunyanlengxue]

命名空间找到了


但提示 “TreeView”是不明确的引用

什么意思啊

[chanviva]

顶一下

[tao77]

我正好遇到这个问题，重写了一个TreeView，可以改变选中后的背景色，要的话发邮箱，我发给你。

[machunyanlengxue]

我的邮箱是:[e-mail]

[machunyanlengxue]

是不是改_SelectNodeColor = Color.Blue;这一项


怎么不行啊

[machunyanlengxue]

改了以后，怎么调用啊

[guchunjia0221]

可以发给我一份么
[e-mail]
谢谢！

[machunyanlengxue]

你什么时候给我发过来啊


我急用啊

[machunyanlengxue]

谁能告诉我怎么做啊????????????????

[tao77]

前段时间正好感上出差，没来，不好意思，直接贴上去吧，我自己写的。

using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace UISystemControlBase
{
public delegate void PaintedEventHandler(object sender);



public partial class UITreeView : System.Windows.Forms.TreeView
{
public event PaintedEventHandler Painted;

private TreeNode mLastNode;

protected virtual void OnPainted()
{
if (Painted != null)
{
Painted(this );
}
}

public UITreeView()
{
InitializeComponent();
}

public UITreeView(IContainer container)
{
container.Add(this);

InitializeComponent();
}

#region "属性"
Bitmap mbmpExpandIcon = null;
Bitmap mbmpCollapseIcon = null;
Bitmap mbmpNoneIcon = null;
int mintTextLeft = 19;
Color mcolSelectedNodeBackColor = Color.FromArgb(255, 241, 230);

public Color SelectedNodeBackColor
{
get { return mcolSelectedNodeBackColor; }
set { mcolSelectedNodeBackColor = value; }
}

public int TextLeft
{
get { return mintTextLeft; }
set { mintTextLeft = value; }
}

public Bitmap ExpandIcon
{
get { return mbmpExpandIcon; }
set { mbmpExpandIcon = value; }
}

public Bitmap CollapseIcon
{
get { return mbmpCollapseIcon; }
set { mbmpCollapseIcon = value; }
}

public Bitmap NoneIcon
{
get { return mbmpNoneIcon; }
set { mbmpNoneIcon = value; }
}
#endregion

public int GetAllNodesHeight()
{
int intTop;
int intBottom;

if (base.Nodes.Count == 0) return 0;

intTop = base.Nodes[0].Bounds.Y;

GetLastNode(base.Nodes[base.Nodes.Count - 1]);

intBottom = mLastNode.Bounds.Y;

return intBottom - intTop + this.ItemHeight ;

}

private void GetLastNode(TreeNode n)
{
if (n.Nodes.Count != 0 && n.IsExpanded)
{
GetLastNode(n.Nodes[n.Nodes.Count - 1]);
}
else
{
mLastNode = n;
}
}

protected override void WndProc(ref System.Windows.Forms.Message m)
{
if (m.Msg == 15)
{
OnPainted();
}
base.WndProc(ref m);
}

private void UITreeView_AfterExpand(object sender, TreeViewEventArgs e)
{
this.Invalidate();

}

private void UITreeView_AfterCollapse(object sender, TreeViewEventArgs e)
{
this.Invalidate();

}

private void UITreeView_MouseDown(object sender, MouseEventArgs e)
{
TreeNode node = this.GetNodeAt(e.X, e.Y);
if (node != null)
{
this.SelectedNode = node;
}
}


private void UITreeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
if ((e.State & TreeNodeStates.Selected) != 0)
{
e.Graphics.FillRectangle(new SolidBrush(mcolSelectedNodeBackColor), 0, e.Node.Bounds.Y, this.Width, e.Node.Bounds.Height);

}

//Debug.Print(e.Node.Text + ":" + e.State.ToString());

if (e.Node.Level == 0)
{
if (e.Node.Nodes.Count != 0)
{
if (e.Node.IsExpanded && mbmpExpandIcon != null)
{
e.Graphics.DrawImage(mbmpExpandIcon, 0, e.Bounds.Y + (int)(e.Bounds.Height - mbmpExpandIcon.Height) / 2, mbmpExpandIcon.Width, mbmpExpandIcon.Height);
}
else if (!e.Node.IsExpanded && mbmpCollapseIcon != null)
{
e.Graphics.DrawImage(mbmpCollapseIcon, 0, e.Bounds.Y + (int)(e.Bounds.Height - mbmpCollapseIcon.Height) / 2, mbmpCollapseIcon.Width, mbmpCollapseIcon.Height);
}
}
else if (mbmpNoneIcon != null)
{
e.Graphics.DrawImage(mbmpNoneIcon, 0, e.Bounds.Y + (int)(e.Bounds.Height - mbmpNoneIcon.Height) / 2, mbmpNoneIcon.Width, mbmpNoneIcon.Height);
}

}

Image NodeIcon = null;

Font NodeFont;
Color NodeForeColor;

if (e.Node.NodeFont != null)
NodeFont = e.Node.NodeFont;
else
NodeFont = this.Font;

if (e.Node.ForeColor != Color.Empty)
NodeForeColor = e.Node.ForeColor;
else
NodeForeColor = this.ForeColor;

int FontHeight = new Font(NodeFont.FontFamily, NodeFont.Size, GraphicsUnit.Pixel).Height;

Point ptNodeText = new Point();

if (this.ImageList != null)
{
if (e.Node.ImageIndex >= 0 && e.Node.ImageIndex < this.ImageList.Images.Count)
{
NodeIcon = this.ImageList.Images[e.Node.ImageIndex];
}
else if (e.Node.ImageKey != "")
{
NodeIcon = this.ImageList.Images[e.Node.ImageKey];
}

if (NodeIcon != null)
{
e.Graphics.DrawImage(NodeIcon, mintTextLeft, e.Bounds.Y + (int)(e.Bounds.Height - NodeIcon.Height) / 2, NodeIcon.Width, NodeIcon.Height);
ptNodeText.X = mintTextLeft + NodeIcon.Width + 2;
ptNodeText.Y = e.Bounds.Y + (e.Bounds.Height - FontHeight) / 2;
}
else
{
ptNodeText.X = mintTextLeft;
ptNodeText.Y = e.Bounds.Y + (e.Bounds.Height - FontHeight) / 2;
}

}
else
{
ptNodeText.X = mintTextLeft;
ptNodeText.Y = e.Bounds.Y + (e.Bounds.Height - FontHeight) / 2;
}

e.Graphics.DrawString(e.Node.Text, NodeFont, new SolidBrush(NodeForeColor), ptNodeText);


}


}
}

[shluoping]

InitializeComponent 没有，报错不能呢个编译