disabling a button or showing required validations on button click

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Hey there,

I have a submit button and I want to validate it so that it does not show exception when there is no data to submit in the data table and maybe show an alert or message like "please select an item!".

Also want to know how can I disable a button.

Thanks
Amit

Posted 15-Sep-10 1:14am

AmitChoudhary10

Updated 15-Sep-10 3:40am

Dalek Dave

v2

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Comments

Dalek Dave 15-Sep-10 9:40am

Edited for Grammar.

4 solutions

Solution 3

say for example your button id is btnSubmit
and the name of the datatable is dtTestTable then the code in the code behind will be

if(dtTestTable != null )
{
  btnSubmit.CausesValidation = false; 
}
else
{
  btnSubmit.CausesValidation = true;
}

cheers... :)
if this solves your problem mark it as answered

Posted 15-Sep-10 2:10am

senguptaamlan

Comments

AmitChoudhary10 15-Sep-10 8:14am

and i'll be using this with requiredField validator?...

senguptaamlan 15-Sep-10 8:16am

yeah right...

AmitChoudhary10 15-Sep-10 8:22am

its showing error

Control 'btnSubmit' referenced by the ControlToValidate property of 'rvSubmit' cannot be validated.

senguptaamlan 15-Sep-10 8:25am

what is rvSubmit?

AmitChoudhary10 15-Sep-10 8:25am

id required field validator for btnSubmit

senguptaamlan 15-Sep-10 8:29am

don't set the id of the button as controlToValidate property of the required field validator, instead give the id of the text box or drop down from where the user needs to make the selection.

AmitChoudhary10 15-Sep-10 8:33am

then how would it validate the button?....

AmitChoudhary10 15-Sep-10 8:37am

it is again showing exception--

System.FormatException: Input string was not in a correct format.

when datatable=null

senguptaamlan 15-Sep-10 8:46am

paste your code

AmitChoudhary10 16-Sep-10 0:10am

my code for btnSubmit click is-

protected void btnSubmit_Click(object sender, EventArgs e)
{
if (gvOrders.Rows.Count > 0)
{
foreach (GridViewRow row in gvOrders.Rows)
{
InsertOrder(Convert.ToInt32(row.Cells[0].Text), Convert.ToInt32(row.Cells[3].Text));
}
}
txtAddress.Text = string.Empty;
txtName.Text = string.Empty;
txtPhone.Text = string.Empty;
txtQuantity.Text = string.Empty;
ddlSearchItems.SelectedIndex = -1;
lblActualPrice.Text = string.Empty;
gvOrders.Visible = false;
gvOrders.DataSource = null;
dtValues.Clear();

if (dtValues != null)
{
btnSubmit.CausesValidation = false;
}
else
{
btnSubmit.CausesValidation = true;
}
}

AmitChoudhary10 16-Sep-10 0:12am

And errors are due to this method that i am using for inserting records into database-

private void InsertOrder(int productId, int quantity)
{
objSqlHelper.InsertOrderInDB(txtName.Text, txtAddress.Text, Convert.ToInt32(txtPhone.Text), DateTime.Now, productId, quantity);
}

Solution 4

hello,

This article might help.

Disable an ASP.NET button during PostBack with AJAX loading background image[^]

Posted 15-Sep-10 4:03am

Bryian Tan

Comments

Dalek Dave 15-Sep-10 10:05am

Good Link.

Solution 2

This answer is for required validations.
drag required validator control in tool box and put into corresponding validating control.(text box)
steps to do ,
control to validate:which control(ie,text box )
error message :whatever you displaying message clicking submit button

Posted 15-Sep-10 1:41am

Ashika s

Comments

AmitChoudhary10 15-Sep-10 7:45am

Okay but i don't think i can use it for something like when a datatable is null or a gridview is null.can i?...

Ashika s 15-Sep-10 8:02am

recquired field validator is using for validating controls.
for data table ,using this if(datatable.rows.count>0)

aayu 15-Sep-10 8:26am

aur if you want to put your condition then u can use custom validating

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aayu · Accepted Answer · 2010-09-15T01:24:00

Solution 1

This answer is for disable a button

You can keep a image and the button in the same div tag. Initially, make the
button visible and the image invisible. And when the user clicks the button
then hide the button and make the image visible. So in this situation user
will not be able to click the button twice and your problem will get solved.

Posted 15-Sep-10 1:24am

aayu

Comments

AmitChoudhary10 15-Sep-10 7:33am

Reason for my vote of 5
Automatic vote of 5 for accepting answer.

AmitChoudhary10 15-Sep-10 7:41am

But its not an image button,its a simple asp.net button and also i want to use some validations or alert.

Dalek Dave 15-Sep-10 9:40am

Good Answer.