Make Custom Validators Produce Alert
Mar 3, 2010
All ASP.Net client validation messages can be shown as an alert by setting the ShowMessageBox="True" property on the ValidationSummary control. This works fine for anything that happens on the client.
For the custom validators that validate server-side I had assumed that what would happen is that when the page is returned to the browser, ASP.Net would inject some javascript to show the alert box. However this isnt the case.
If you had relied on the message box to show detail and just have a * next to the erroneous field (as per my clients req's) then it wont work as intended. Does anyone have a solution for doing this? What I want is a way to possibly override the ValidationSummary control to inject javascript onto the page or something like this.
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Jan 11, 2011
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My Server Control Code is as follows:
[Code]...
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Jan 15, 2010
I'm attempting to create a custom control that extends the Table class. Inside of the table will be rendered a number of different controls based on a specified identifying property. On some of these controls, however, I need to specify validation for data types and requirement. To me, the most logical way of doing so is to add validators to the table and set their appropriate properties to specify which controls to validate. In doing so, however, I've discovered that none of the validators added will even render on the page in which the control is added. So is this a valid construct?
Here's an example of what I mean:
[Code]....
End result? No validation. So what's the move?
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-continuation of my question:
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Jan 14, 2010
I'm attempting to create a custom control that extends the Table class. Inside of the table will be rendered a number of different controls based on a specified identifying property. On some of these controls, however, I need to specify validation for data types and requirement.To me, the most logical way of doing so is to add validators to the table and set their appropriate properties to specify which controls to validate. In doing so, however, I've discovered that none of the validators added will even render on the page in which the control is added. So is this a valid construct?Here's an example of what I mean:
[Code]....
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[Code]....
[Code]....
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in the validation part.
Here goes the code:
[Code]....
At this particular part of the code:
[Code]....
I got 'Expression does not produce a value' in (ccJoin.ValidateCaptcha(tb_captcha.Text))
That code is used to validate and ensure that the user produces right value in captcha..
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<div>
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Inherits DataSourceControl
Implements IDataSource 'Have tried with this statement included AND excluded = same result
Protected Overrides Function GetView(ByVal viewName As String) As System.Web.UI.DataSourceView Implements IDataSource.GetView
'Code here
End Function
Protected Overrides Function GetViewNames() As System.Collections.ICollection Implements IDataSource.GetViewNames
'Code here
End Function
End Class
Looking at the stack trace shows that the error originates at:
System.Web.UI.WebControls.DataBoundControl.GetDataSource().
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protected virtual IDataSource GetDataSource()
{
if ((!base.DesignMode && this._currentDataSourceValid) && (this._currentDataSource != null))
{
return this._currentDataSource;
}
IDataSource source = null;
string dataSourceID = this.DataSourceID;
if (dataSourceID.Length != 0)
{
Control control = DataBoundControlHelper.FindControl(this, dataSourceID);
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{
throw new HttpException(SR.GetString("DataControl_DataSourceDoesntExist", new object[] { this.ID, dataSourceID }));
}
source = control as IDataSource;
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{
throw new HttpException(SR.GetString("DataControl_DataSourceIDMustBeDataControl", new object[] { this.ID, dataSourceID }));
}
}
return source;
}
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