[置顶] winform上实现webform上的自动记录式textbox复合控件

 

 

 

控件创建过程：

解决方案->右键添加新项目->类库为Common->添加C_XML.cs类

C_XML.cs

using System; using System.Collections.Generic; using System.Text; using System.Xml; using System.Collections; namespace Common { /// <summary> /// XML操作类 /// </summary> public class C_XML { private XmlDocument _doc; private string _filepath; public C_XML(string filepath) { _filepath = filepath; _doc = new XmlDocument(); _doc.Load(_filepath); } /// <summary> /// 返回doc /// </summary> public XmlDocument XmlDoc { get { if (_doc != null) return _doc; else return null; } } /// <summary> /// 根节点名称 /// </summary> public string Root { get { if (_doc.DocumentElement != null) { return _doc.DocumentElement.LocalName; } else { return null; } } } /// <summary> /// 获取节点的第一个子集名称 /// </summary> public string RootFirst { get { if (_doc.DocumentElement.FirstChild != null) { return _doc.DocumentElement.FirstChild.LocalName; } else { return null; } } } /// <summary> /// XML字节属性名称 /// </summary> public XmlAttributeCollection FirstChilesAttributes { get { if (_doc.DocumentElement.FirstChild.Attributes != null) { return _doc.DocumentElement.FirstChild.Attributes; } else { return null; } } } /// <summary> /// 保存 /// </summary> public void Save() { _doc.Save(_filepath); } } }

 

 

 

解决方案->右键添加新项目->windows控件库命名为DropDownTextBox

添加对Common的引用

添加information文件->创建info.xml文件

info.xml

<?xml version="1.0" encoding="utf-8" ?> <root> <information value="hello world!"></information> </root>

 

DropDownTextBox.cs

 using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Text; using System.Windows.Forms; using Common; using System.IO; using System.Xml; namespace DropDownTextBox { public partial class DropDownTextBox : UserControl { private Int32 _dropdowncount = 6; private Int32 _height; private Boolean _tem = false; private Common.C_XML _doc; private ListBox _listbox = new ListBox(); public DropDownTextBox() { InitializeComponent(); } /// <summary> /// textbox记录信息数量 /// </summary> public Int32 DropDownCount { get { return _dropdowncount; } set { _dropdowncount = value; } } /// <summary> /// textbox文本信息 /// </summary> public String Tb_Text { get { return tb_text.Text.Trim(); } } private void DropDownTextBox_Load(object sender, EventArgs e) { _doc = new C_XML(Path.GetFullPath("info.xml")); XmlNode _node = _doc.XmlDoc.SelectSingleNode(_doc.Root); if (_node.ChildNodes.Count > DropDownCount) { for (int i = 0; i < _node.ChildNodes.Count - DropDownCount;i++ ) { _node.RemoveChild(_node.LastChild); } _doc.Save(); } _height = (DropDownCount + 1) * 12; // // listBox1 // this._listbox.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel); this._listbox.FormattingEnabled = true; this._listbox.ItemHeight = 12; this._listbox.Location = new System.Drawing.Point(this.Location.X, this.Location.Y + this.tb_text.Height - 1); this._listbox.Name = "_listbox"; this._listbox.Size = new System.Drawing.Size(112, _height); this._listbox.TabIndex = 1; this._listbox.Visible = false; this._listbox.SelectedValueChanged += new System.EventHandler(this._listbox_SelectedValueChanged); Form parform = this.FindForm(); parform.Controls.Add(this._listbox); this._listbox.BringToFront(); } //查询XML文件 private void tb_text_TextChanged(object sender, EventArgs e) { if (_tem && !_listbox.Visible) return; _doc = new C_XML(Path.GetFullPath("info.xml")); XmlNodeList nodelist = _doc.XmlDoc.SelectNodes(_doc.Root + "/" + _doc.RootFirst + "[contains(@" + _doc.FirstChilesAttributes[0].LocalName + ",'" + this.tb_text.Text.Trim() + "')]"); if (nodelist.Count > 0) { _listbox.Items.Clear(); foreach (XmlNode node in nodelist) { _listbox.Items.Add(node.Attributes[0].InnerText); } if (nodelist.Count < _dropdowncount * 12 / this._listbox.ItemHeight) this._listbox.Height = nodelist.Count * this._listbox.ItemHeight + 13; else this._listbox.Height = _height; this._listbox.Visible = true; } else { this._listbox.Visible = false; } } private void _listbox_SelectedValueChanged(object sender, EventArgs e) { if (!(_listbox.SelectedIndex < 0)) { _listbox.Visible = false; _tem = true; this.tb_text.Text = _listbox.SelectedItem.ToString(); _tem = false; } } } }

 

DropDownTextBox.Designer.cs

namespace DropDownTextBox { partial class DropDownTextBox { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region 组件设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { this.tb_text = new System.Windows.Forms.TextBox(); this.SuspendLayout(); // // tb_text // this.tb_text.Dock = System.Windows.Forms.DockStyle.Left; this.tb_text.Location = new System.Drawing.Point(0, 0); this.tb_text.Name = "tb_text"; this.tb_text.Size = new System.Drawing.Size(112, 21); this.tb_text.TabIndex = 0; this.tb_text.TextChanged += new System.EventHandler(this.tb_text_TextChanged); // // DropDownTextBox // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.Controls.Add(this.tb_text); this.Name = "DropDownTextBox"; this.Size = new System.Drawing.Size(112, 21); this.Load += new System.EventHandler(this.DropDownTextBox_Load); this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.TextBox tb_text; } }

 

 

解决方案->右键添加新项目->windows应用程序命名为MyTest

Form1.cs

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using Common; using System.IO; using System.Xml; namespace MyTest { public partial class Form1 : Form { private C_XML _doc; public Form1() { InitializeComponent(); _doc = new C_XML(Path.GetFullPath("info.xml")); dropDownTextBox1.DropDownCount = 6; } private void button1_Click(object sender, EventArgs e) { XmlNode _node = _doc.XmlDoc.SelectSingleNode(_doc.Root); if (_node.ChildNodes.Count >= dropDownTextBox1.DropDownCount) _node.RemoveChild(_node.LastChild); XmlElement information = _doc.XmlDoc.CreateElement(_doc.RootFirst); XmlAttribute newAttr = _doc.XmlDoc.CreateAttribute(_doc.FirstChilesAttributes[0].LocalName); newAttr.Value = this.dropDownTextBox1.Tb_Text; information.Attributes.Append(newAttr); _node.PrependChild(information); _doc.Save(); } } }

 

Form1.Designer.cs

namespace MyTest { partial class Form1 { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.dropDownTextBox1 = new DropDownTextBox.DropDownTextBox(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(268, 207); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 3; this.button1.Text = "button1"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // dropDownTextBox1 // this.dropDownTextBox1.DropDownCount = 6; this.dropDownTextBox1.Location = new System.Drawing.Point(252, 88); this.dropDownTextBox1.Name = "dropDownTextBox1"; this.dropDownTextBox1.Size = new System.Drawing.Size(112, 21); this.dropDownTextBox1.TabIndex = 2; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(607, 392); this.Controls.Add(this.dropDownTextBox1); this.Controls.Add(this.button1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion private DropDownTextBox.DropDownTextBox dropDownTextBox1; private System.Windows.Forms.Button button1; } }

 

源码下载地址：http://download.csdn.net/source/1113501