我想自定义一个控件。可输入的下拉框。但是不太会定义啊。 环境vs2008
<asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
<span style="width:18px;border:0px solid red; position:relative; ">
<asp:DropDownList ID="DropDownList1" runat="server" ></asp:DropDownList>
</span>
还要对span设置样式。我都不会。希望各位大侠 指点一下呀
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网上有现成的
http://www.obout.com/combobox/
也可以搜索google asp.net combox control
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http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/ComboBox/ComboBox.aspx
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参考(第二个搜索功能)：
http://www.cnblogs.com/insus/archive/2011/11/25/2263185
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路过，帮顶下
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我这有个 代码是
- C# code
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Ex060{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { //if (comboBox1.Text != "") //{ // string newItem=comboBox1.Text.Trim(); // for (int i = 0; i < comboBox1.Items.Count; i++) // { // if (string.Compare(newItem, comboBox1.Items[i].ToString()) == 1) // { // MessageBox.Show("组合框中已有相同项，不能再添加！"); // return; // } // else // comboBox1.Items.Add(comboBox1.Text.Trim()); // } //} } private void btnAdd_Click(object sender, EventArgs e) { if (comboBox1.Text != "") { string newItem = comboBox1.Text.Trim();//获取输入文本 bool flag = false;//标识变量 for (int i = 0; i < comboBox1.Items.Count; i++) { //判断是否有相同项 if (string.Compare(newItem, comboBox1.Items[i].ToString()) == 0) { flag = true; MessageBox.Show("已经有相同项，不能再添加"); } } if (flag == false) { comboBox1.Items.Add(newItem);//将输入文本添加到项中 comboBox1.Text = ""; } } } }}
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这个 是设计界面代码
- C# code
namespace Ex060{ 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.label1 = new System.Windows.Forms.Label(); this.comboBox1 = new System.Windows.Forms.ComboBox(); this.btnAdd = new System.Windows.Forms.Button(); this.SuspendLayout(); // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(40, 53); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(29, 12); this.label1.TabIndex = 0; this.label1.Text = "年级"; // // comboBox1 // this.comboBox1.FormattingEnabled = true; this.comboBox1.Items.AddRange(new object[] { "2004级", "2005级"}); this.comboBox1.Location = new System.Drawing.Point(93, 53); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(121, 20); this.comboBox1.TabIndex = 1; this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged); this.comboBox1.TextChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged); // // btnAdd // this.btnAdd.Location = new System.Drawing.Point(93, 99); this.btnAdd.Name = "btnAdd"; this.btnAdd.Size = new System.Drawing.Size(75, 23); this.btnAdd.TabIndex = 2; this.btnAdd.Text = "添加"; this.btnAdd.UseVisualStyleBackColor = true; this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(265, 156); this.Controls.Add(this.btnAdd); this.Controls.Add(this.comboBox1); this.Controls.Add(this.label1); this.Name = "Form1"; this.Text = "根据输入增加选项"; this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Label label1; private System.Windows.Forms.ComboBox comboBox1; private System.Windows.Forms.Button btnAdd; }}