如何给select框添加option

var sel=document.getElementById("select控件ID")

var op=document.createElement("option")  //新建option

op.setAttribute("value",0)  // 设置value

op.appendChild(document.createTextNode("请选择---"))  //text

sel.appendChild(op)  // 为select添加option

这样就可以给select添加option了

你说的是下拉框控件吗？ 不知道要的是不是这样的

在HTML是select控件

在 Winform应该是comboBox吧

//returnTable()这个方法里返回DataTable类型表格，里面有“id”和"procName"列

DataTable dt= returnTable()

this.comboBox1.DataSource = dt

this.comboBox1.ValueMember = "id"

this.comboBox1.DisplayMember = "procName"

在Webform应该是dropdownList 写在Load方法里

con.Open()

SqlCommand cmd = new SqlCommand(strSql,con)

SqlDataReader dr = cmd.ExecuteReader()

while (dr.Read())

{

DropDownList1.Items.Add(new ListItem(dr["status"].ToString(), dr["status_Id"].ToString()))

}

你可以先在设计器里手动添加，然后在Designer.cs里找到相应代码剪切过来就行，如下

private System.Windows.Forms.ToolStrip toolStrip1

private System.Windows.Forms.ToolStripDropDownButton toolStripButton1

private System.Windows.Forms.ToolStripMenuItem aAAToolStripMenuItem

private System.Windows.Forms.ToolStripMenuItem aAAAToolStripMenuItem

private System.Windows.Forms.ToolStripMenuItem bBBToolStripMenuItem

private System.Windows.Forms.ToolStripMenuItem cCCToolStripMenuItem

public Form1()

{

InitializeComponent()

this.toolStrip1 = new System.Windows.Forms.ToolStrip()

this.toolStripButton1 = new System.Windows.Forms.ToolStripDropDownButton()

this.aAAToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem()

this.bBBToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem()

this.cCCToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem()

this.aAAAToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem()

this.Controls.Add(toolStrip1)

//

// toolStrip1

//

this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {

this.toolStripButton1})

this.toolStrip1.Location = new System.Drawing.Point(0, 0)

this.toolStrip1.Name = "toolStrip1"

this.toolStrip1.Size = new System.Drawing.Size(617, 25)

this.toolStrip1.TabIndex = 3

this.toolStrip1.Text = "toolStrip1"

//

// toolStripButton1

//

this.toolStripButton1.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image

this.toolStripButton1.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {

this.aAAToolStripMenuItem,

this.bBBToolStripMenuItem,

this.cCCToolStripMenuItem})

this.toolStripButton1.ImageTransparentColor = System.Drawing.Color.Magenta

this.toolStripButton1.Name = "toolStripButton1"

this.toolStripButton1.Size = new System.Drawing.Size(29, 22)

this.toolStripButton1.Text = "toolStripButton1"

//

// aAAToolStripMenuItem

//

this.aAAToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {

this.aAAAToolStripMenuItem})

this.aAAToolStripMenuItem.Name = "aAAToolStripMenuItem"

this.aAAToolStripMenuItem.Size = new System.Drawing.Size(152, 22)

this.aAAToolStripMenuItem.Text = "AAA"

//

// bBBToolStripMenuItem

//

this.bBBToolStripMenuItem.Name = "bBBToolStripMenuItem"

this.bBBToolStripMenuItem.Size = new System.Drawing.Size(152, 22)

this.bBBToolStripMenuItem.Text = "BBB"

//

// cCCToolStripMenuItem

//

this.cCCToolStripMenuItem.Name = "cCCToolStripMenuItem"

this.cCCToolStripMenuItem.Size = new System.Drawing.Size(152, 22)

this.cCCToolStripMenuItem.Text = "CCC"

//

// aAAAToolStripMenuItem

//

this.aAAAToolStripMenuItem.Name = "aAAAToolStripMenuItem"

this.aAAAToolStripMenuItem.Size = new System.Drawing.Size(152, 22)

this.aAAAToolStripMenuItem.Text = "AAAA"

}

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