在下拉列表中通过操作启用禁用按钮 [英] Enabling a disable a button by action in a drop down list

问题描述

亲爱的专家



需要启用基于下拉列表外部按钮的按钮，如下所示

 受保护  void  ddl_Moratorium_SelectedIndexChanged （ object  sender，EventArgs e）
 {
  if （ddl_Moratorium.Text！ =   NONE）
 txt_Morat_Mths.Enabled = 假; 
} 

你是怎么做到的？





谢谢

解决方案

试试这个...

  protected   void  ddl_Moratorium_SelectedIndexChanged（ object  sender，EventArgs e）
 {
 
  if （！（（ddl_Moratorium.SelectedItem） .Text）.Equals（  NONE）））
 txt_Morat_Mths.Enabled = 假; 
 
} 

要获得在下拉列表中选择的项目文本，您应该使用



Dorpdown1.SelectedItem.Text

  protected   void  ddl_Moratorium_SelectedIndexChanged（ object  sender，EventArgs e）
 {
  if （ddl_Moratorium.Text！=   NONE ）
 txt_Morat_Mths.Enabled =  false ; 
  else  
 txt_Morat_Mths.Enabled =  true ; 
  //  不清楚你想要做什么？ 
} 

Dear Expert

need to enable a button based on the outome of a drop down list as follows

protected void ddl_Moratorium_SelectedIndexChanged(object sender, EventArgs e)
       {
           if (ddl_Moratorium.Text != "NONE")
               txt_Morat_Mths.Enabled = false;
       }

How do you do it?


Thanks

解决方案

try this...

protected void ddl_Moratorium_SelectedIndexChanged(object sender, EventArgs e)
       {

           if (!((ddl_Moratorium.SelectedItem.Text).Equals("NONE")))
               txt_Morat_Mths.Enabled = false;

       }

To get the text of the item selected in your dropdown list you should use

Dorpdown1.SelectedItem.Text

protected void ddl_Moratorium_SelectedIndexChanged(object sender, EventArgs e)
       {
           if (ddl_Moratorium.Text != "NONE")
               txt_Morat_Mths.Enabled = false;
           else 
               txt_Morat_Mths.Enabled = true;
//unclear what exactly you want to do?
       }

这篇关于在下拉列表中通过操作启用禁用按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！