__doPostBack() function isn't working (asp.net)

I am trying to trigger button event from the JS code. But doPostBack in JS function reg() is not directing to the c# code. Please tell me what's wrong.
Here is my code:

<script>

        function reg() {

            var name = document.getElementById('name').value;

            var id = document.getElementById('cnic').value;

            var age = document.getElementById('age').value;

            var ph = document.getElementById('phone').value;

            var pas = document.getElementById('pass').value;

            if (id == '' || pas == '' || age == '' || ph == '' || pas == '')

                window.alert("Write all fields");

            else {

                __doPostBack('<%= Button1.UniqueID%>','')

            }

        }

    </script>  





 <div >

       <asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit"/>

    </div>

Here is the server side c# function associated with the button:

 protected void Btn_Click(object sender, EventArgs e)

    {

        Button clickedButton = (Button)sender;

        clickedButton.Text = "...button clicked...";

    }

Note: In else block, I want reg() function to redirect to the Btn_Click function.

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

add a comment |

I am trying to trigger button event from the JS code. But doPostBack in JS function reg() is not directing to the c# code. Please tell me what's wrong.
Here is my code:

<script>

        function reg() {

            var name = document.getElementById('name').value;

            var id = document.getElementById('cnic').value;

            var age = document.getElementById('age').value;

            var ph = document.getElementById('phone').value;

            var pas = document.getElementById('pass').value;

            if (id == '' || pas == '' || age == '' || ph == '' || pas == '')

                window.alert("Write all fields");

            else {

                __doPostBack('<%= Button1.UniqueID%>','')

            }

        }

    </script>  





 <div >

       <asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit"/>

    </div>

Here is the server side c# function associated with the button:

 protected void Btn_Click(object sender, EventArgs e)

    {

        Button clickedButton = (Button)sender;

        clickedButton.Text = "...button clicked...";

    }

Note: In else block, I want reg() function to redirect to the Btn_Click function.

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

add a comment |

I am trying to trigger button event from the JS code. But doPostBack in JS function reg() is not directing to the c# code. Please tell me what's wrong.
Here is my code:

<script>

        function reg() {

            var name = document.getElementById('name').value;

            var id = document.getElementById('cnic').value;

            var age = document.getElementById('age').value;

            var ph = document.getElementById('phone').value;

            var pas = document.getElementById('pass').value;

            if (id == '' || pas == '' || age == '' || ph == '' || pas == '')

                window.alert("Write all fields");

            else {

                __doPostBack('<%= Button1.UniqueID%>','')

            }

        }

    </script>  





 <div >

       <asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit"/>

    </div>

Here is the server side c# function associated with the button:

 protected void Btn_Click(object sender, EventArgs e)

    {

        Button clickedButton = (Button)sender;

        clickedButton.Text = "...button clicked...";

    }

Note: In else block, I want reg() function to redirect to the Btn_Click function.

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

I am trying to trigger button event from the JS code. But doPostBack in JS function reg() is not directing to the c# code. Please tell me what's wrong.
Here is my code:

<script>

        function reg() {

            var name = document.getElementById('name').value;

            var id = document.getElementById('cnic').value;

            var age = document.getElementById('age').value;

            var ph = document.getElementById('phone').value;

            var pas = document.getElementById('pass').value;

            if (id == '' || pas == '' || age == '' || ph == '' || pas == '')

                window.alert("Write all fields");

            else {

                __doPostBack('<%= Button1.UniqueID%>','')

            }

        }

    </script>  





 <div >

       <asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit"/>

    </div>

Here is the server side c# function associated with the button:

 protected void Btn_Click(object sender, EventArgs e)

    {

        Button clickedButton = (Button)sender;

        clickedButton.Text = "...button clicked...";

    }

Note: In else block, I want reg() function to redirect to the Btn_Click function.

asp.net onclick postback dopostback

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

edited Nov 28 '18 at 18:58

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

asked Nov 28 '18 at 16:16

Hashir Sarwar

14011

add a comment |

2 Answers
2

active

oldest

votes

It's been a while since I did this, but I think it needs to be the server Id, not client id of the button.

 __doPostBack('<%= button1.UniqueID%>','')

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

add a comment |

Looks like you are missing the OnClick in asp:Button.

<asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit" OnClick="Btn_Click"/>

There is a in-built method in ASP.NET to generate the __doPostBack() method.

<%= Page.ClientScript.GetPostBackEventReference(Button1, String.Empty) %>;

If still not working after the changes, I would suggest you to check the network traffic using Network tab of browser Debug tools(or Fiddler) when you click on the button.

Also set a break point inside the reg() method to see how the control goes.

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

It's been a while since I did this, but I think it needs to be the server Id, not client id of the button.

 __doPostBack('<%= button1.UniqueID%>','')

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

add a comment |

It's been a while since I did this, but I think it needs to be the server Id, not client id of the button.

 __doPostBack('<%= button1.UniqueID%>','')

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

add a comment |

It's been a while since I did this, but I think it needs to be the server Id, not client id of the button.

 __doPostBack('<%= button1.UniqueID%>','')

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

It's been a while since I did this, but I think it needs to be the server Id, not client id of the button.

 __doPostBack('<%= button1.UniqueID%>','')

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

edited Nov 28 '18 at 16:44

answered Nov 28 '18 at 16:20

Sean T

1,356715

answered Nov 28 '18 at 16:20

Sean T

1,356715

answered Nov 28 '18 at 16:20

Sean T

1,356715

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

add a comment |

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

after returning true, how it will get into Btn_Click function? i didn't specify it anywhere.

– Hashir Sarwar
Nov 28 '18 at 16:36

It's been a while since I did webforms so as I say that may be incorrect. you may have to specify onclick attribute in addition to onclientclick. Anyhow the first part of the answer is correct

– Sean T
Nov 28 '18 at 16:39

I just recall that if you return true on client click it will go to the server click event, and since it's a submit button this will be posted

– Sean T
Nov 28 '18 at 16:40

still not working for me

– Hashir Sarwar
Nov 28 '18 at 18:57

@HashirSarwar just put a click attribute on the button then that calls the server side function and return false under your write all fields line

– Sean T
Nov 29 '18 at 9:39

add a comment |

Looks like you are missing the OnClick in asp:Button.

<asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit" OnClick="Btn_Click"/>

There is a in-built method in ASP.NET to generate the __doPostBack() method.

<%= Page.ClientScript.GetPostBackEventReference(Button1, String.Empty) %>;

If still not working after the changes, I would suggest you to check the network traffic using Network tab of browser Debug tools(or Fiddler) when you click on the button.

Also set a break point inside the reg() method to see how the control goes.

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

add a comment |

Looks like you are missing the OnClick in asp:Button.

<asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit" OnClick="Btn_Click"/>

There is a in-built method in ASP.NET to generate the __doPostBack() method.

<%= Page.ClientScript.GetPostBackEventReference(Button1, String.Empty) %>;

If still not working after the changes, I would suggest you to check the network traffic using Network tab of browser Debug tools(or Fiddler) when you click on the button.

Also set a break point inside the reg() method to see how the control goes.

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

add a comment |

Looks like you are missing the OnClick in asp:Button.

<asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit" OnClick="Btn_Click"/>

There is a in-built method in ASP.NET to generate the __doPostBack() method.

<%= Page.ClientScript.GetPostBackEventReference(Button1, String.Empty) %>;

If still not working after the changes, I would suggest you to check the network traffic using Network tab of browser Debug tools(or Fiddler) when you click on the button.

Also set a break point inside the reg() method to see how the control goes.

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

Looks like you are missing the OnClick in asp:Button.

<asp:Button id="Button1" OnClientClick="reg()" runat="server" Text="Submit" OnClick="Btn_Click"/>

There is a in-built method in ASP.NET to generate the __doPostBack() method.

<%= Page.ClientScript.GetPostBackEventReference(Button1, String.Empty) %>;

If still not working after the changes, I would suggest you to check the network traffic using Network tab of browser Debug tools(or Fiddler) when you click on the button.

Also set a break point inside the reg() method to see how the control goes.

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

edited Nov 28 '18 at 20:58

answered Nov 28 '18 at 20:51

Charmis Varghese

806

answered Nov 28 '18 at 20:51

Charmis Varghese

806

answered Nov 28 '18 at 20:51

Charmis Varghese

806

add a comment |

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