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ASP.NET 動(dòng)態(tài)寫(xiě)入服務(wù)器端控件第2/2頁(yè)

更新時(shí)間：2009年04月17日 22:28:33 作者：

使用Asp.net進(jìn)行開(kāi)發(fā)時(shí)，因?yàn)槟承┬枨笤?，需要在?yè)面中動(dòng)態(tài)添加控件。當(dāng)然，這些控件可以是普通的html標(biāo)簽，也可以是Asp.net獨(dú)有的服務(wù)器端控件。

3．后臺(tái)代碼：

以下為引用的內(nèi)容：

復(fù)制代碼代碼如下:

///<summary> 

/// Create textbox list 
///</summary> 
///<param name="num">textbox list count</param> 
private void CreateTextBoxList(int num) 
{ 
HtmlGenericControl div; 
HtmlGenericControl span; 
TextBox txt; 
RegularExpressionValidator rev; 

for (int i = 0; i < num; i++) 
{ 
//創(chuàng)建div 
div = new HtmlGenericControl(); 
div.TagName = "div"; 
div.ID = "divTextBox" + i.ToString(); 
div.Attributes["class"] = "item2"; 

//創(chuàng)建span 
span = new HtmlGenericControl(); 
span.ID = "spanTextBox" + i.ToString(); 
span.InnerHtml = "Url Address" + (i+1).ToString() + ":"; 

//創(chuàng)建TextBox 
txt = new TextBox(); 
txt.ID = "txt" + i.ToString(); 
txt.CssClass = "input"; 

//創(chuàng)建格式驗(yàn)證控件，并且將其關(guān)聯(lián)到對(duì)應(yīng)的TextBox 
rev = new RegularExpressionValidator(); 
rev.ID = "rev" + i.ToString(); 
rev.ControlToValidate = txt.ID; 
rev.Display = ValidatorDisplay.Dynamic; 
rev.ValidationGroup = "ShowListContent"; 
rev.ValidationExpression = @"(http(s)?://)?([\w-]+\.)+[\w-]+(/[\w- ./?%&amp;=]*)?"; 
rev.ErrorMessage = "Invalid url Address!"; 

//添加控件到容器 
div.Controls.Add(span); 
div.Controls.Add(txt); 
div.Controls.Add(rev); 
divControls.Controls.Add(div); 
} 
} 

protected void Page_Load(object sender, EventArgs e) 
{ 
if (this.IsPostBack) 
{ 
int txtCount = int.Parse(txtTextCount.Text); 

// 注意：每次PostBack時(shí)，都需要重新動(dòng)態(tài)創(chuàng)建TextBox 
CreateTextBoxList(txtCount); 
} 
} 

protected void btnCreate_Click(object sender, EventArgs e) 
{ 
txtTextCount.Enabled = false; 
btnCreate.Enabled = false; 
} 

protected void btnOK_Click(object sender, EventArgs e) 
{ 
TextBox txt; 
StringBuilder sbResult = new StringBuilder() ; 
int txtCount = int.Parse(txtTextCount.Text); 

//遍歷獲取動(dòng)態(tài)創(chuàng)建的TextBox們中的Text值 
for (int i = 0; i < txtCount; i++) 
{ 
//注意：這里必須通過(guò)上層容器來(lái)獲取動(dòng)態(tài)創(chuàng)建的TextBox，才能獲取取ViewState內(nèi)容 
txt = divControls.FindControl("txt" + i.ToString()) as TextBox; 

if (txt != null && txt.Text.Trim().Length > 0) 
{ 
sbResult.AppendFormat("Url Address{0}: {1}.<br />", i+1, txt.Text.Trim()); 
} 
} 

divMessage.InnerHtml = sbResult.ToString(); 
} 