如何在更改动态创建的文本框文本时对函数进行Calll [英] How to Calll a function on change a dynaically created textbox's text

问题描述

我只需点击一个按钮就可以创建一个文本框。

I have create a textbox by simply clicking a button.

TextBox txtGainMark = new TextBox();
txtGainMark.ID = count.ToString();
txtGainMark.Text = "GiveYourMark";
txtGainMark.Attributes.Add("onchange", "javascript:document.getElementById('lblDataOperation').innerHTML = this.value;");
placeholder.Controls.Add(txtGainMark);

当我更改txtGainMark的文本时，结果显示为标签lblDataOperation，但我希望将更改后的值转换为字符串变量，并将该值调用为C＃函数参数。

when I change the txtGainMark's text, the result shown into a label "lblDataOperation", but I want to get the changed value into a string variable and call a C# function with that value as a parameter.

推荐答案

protected void Page_Load(object sender, EventArgs e)
   {
       TextBox textBox = new TextBox();
       textBox.TextChanged += new EventHandler(textBox_TextChanged);
   }

   protected void textBox_TextChanged(object sender, EventArgs e)
   {
       // Your code here
   }

希望这会有所帮助。

Hope this will help.

在将Textbox添加到占位符之前，只需将TextChanged事件绑定到它。

Before adding Textbox to placeholder, just bind TextChanged event to it.

{

    //... same previous code

    txtGainMark.TextChanged += new EventHandler(txtGainMark_TextChanged);
    placeholder.Controls.Add(txtGainMark);
}
protected void txtGainMark_TextChanged(object sender, EventArgs e)
{
    // Do your work here
}

如果有任何问题，请询问：）

Ask, if any problem :)

是的，请检查autopostback属性。您没有在文本chnage上提交该页面，这就是无法提交页面的原因。

Yes please check with autopostback property. You are not submitting the page on text chnage thats why unable to submit the page.

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