如何在asp.net mvc中回发后保留文本框值 [英] how to retain text box values after postback in asp.net mvc

问题描述

如何在asp.net mvc中提交数据后获取旧值

------------------- -------------------------------------------------- -

@using（Html.BeginForm（Index，Home，FormMethod.Post））

{

< input type =textid =txtNumber1name =txtNumber1/>

< input type =textid =txtNumber2name =txtNumber2/>

< input type =submitid =btnSubmitvalue =Add/>

< input type =textid =txtNumber3name = txtNumber3/>

}

---------------------------- --------------------------------------------

[HttpGet]

[ActionName（Index）]

public ActionResult Index_Get（）

{

返回查看（）;

}



[HttpPost]

[ActionName（Index）]

public ActionResult Index_Post（）

{

string number1 = Request.Form [txtNumber1];

string number2 = Request.Form [txtNumber2];

string number3 =（int.Parse（number1） + int.Parse（number2））。ToString（）;

返回View（）;

}

解决方案

< blockquote>更改

 <  输入    type   =  text    id   =  txtNumber1    name   =  txtNumber1    /  >  
 <   input     type   =  text     id   =  txtNumber2    name   =  txtNumber2    /  >  
 <  输入    type   = 提交    id   =  btnSubmit    value   = 添加    /  >  
 <  输入    type   =  text   < span class =code-attribute> id   =  txtNumber3   名称  =  txtNumber3    /  > ;  

to

 @ Html.TextBox（txtNumber1）
 @ Html.TextBox（txtNumber2）
 @ Html.TextBox（txtNumber3）
 @ Html.TextBox（txtNumber1）
 < ;  输入    type  < span class =code-keyword> = 提交    id   =  btnSubmit    value   = 添加    /  >  

我也面临同样的问题所以这里是解决方案

 <  输入    type   =  text   < span class =code-attribute> id   =  txtNumber1   名称  =  txtNumber1    value   =  @ Request [  txtNumber1]/  > ;  
 <  输入    type   =  text    id   =   txtNumber2    name  < span class =code-keyword> =  txtNumber2   值  =  @ Request [  txtNumber2]/  >  
 <  < span class =code-leadattribute> input     type   = 提交    id   =  btnSubmit    value   = 添加    /  >  
 <  输入   类型  =  text    id   =  txtNumber3    名称  =  txtNumber3    value   =  @ Request [  txtNumber3]/  >  

实际上当您发布表单时，将值提交到服务器并且一个新的表单加载

所以这个简单的语法只分配值属性

value =@ Request [文本输入的名称]





等等你可以做其他文字输入

how to get old values after submitting data in asp.net mvc
-----------------------------------------------------------------------
@using (Html.BeginForm("Index", "Home", FormMethod.Post))
{
<input type="text" id="txtNumber1" name="txtNumber1" />
<input type="text" id="txtNumber2" name="txtNumber2" />
<input type="submit" id="btnSubmit" value="Add" />
<input type="text" id="txtNumber3" name="txtNumber3" />
}
------------------------------------------------------------------------
[HttpGet]
[ActionName("Index")]
public ActionResult Index_Get()
{
return View();
}

[HttpPost]
[ActionName("Index")]
public ActionResult Index_Post()
{
string number1 = Request.Form["txtNumber1"];
string number2 = Request.Form["txtNumber2"];
string number3 = (int.Parse(number1) + int.Parse(number2)).ToString();
return View();
}

解决方案

change

<input type="text" id="txtNumber1" name="txtNumber1" />
<input type="text" id="txtNumber2" name="txtNumber2" />
<input type="submit" id="btnSubmit" value="Add" />
<input type="text" id="txtNumber3" name="txtNumber3" />

to

@Html.TextBox("txtNumber1")
@Html.TextBox("txtNumber2")
@Html.TextBox("txtNumber3")
@Html.TextBox("txtNumber1")
<input type="submit" id="btnSubmit" value="Add" />

i was also facing the same issue so here is the solution

<input type="text" id="txtNumber1" name="txtNumber1" value="@Request["txtNumber1"]"/>
<input type="text" id="txtNumber2" name="txtNumber2" value="@Request["txtNumber2"]"/>
<input type="submit" id="btnSubmit" value="Add" />
<input type="text" id="txtNumber3" name="txtNumber3" value="@Request["txtNumber3"]"/>

actually when you post form the values get submitted to the server and a new form loads up
so this simple syntax allot the value property simply
value = "@Request["name of the text input"]"


and so on you can do for other text inputs

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