Set The Size of TextBox Dynamically in Telerik Report

[Negin]

Hi,

Is there any way to set the size of a textbox dynamically based on length of its text in Telerik Reports?

Thanks.

[Peter]

Hello Negin,

Out of the box the TextBox item can only grow vertically downwards pushing any other items below it. 
However you can use some custom logic to calculate the textbox width based on value length and set it with Binding. Additionally our suggestion is to use a monospaced font.

Property path	Expression
Size	=CalculateSize(ReportItem)

public static Telerik.Reporting.Drawing.SizeU CalculateSize(Telerik.Reporting.Processing.TextBox textBox)
{
    int len = textBox.DataObject["Name"].ToString().Length;
    double width = len * 6; //this is pseudo calculation
    return new Telerik.Reporting.Drawing.SizeU(Telerik.Reporting.Drawing.Unit.Pixel(width), textBox.Size.Height);
}

All the best,
Peter
the Telerik team

[Negin]

Thanks a lot,

Negin

[Alexandre]

Hello,

How do you make this code working :

public static Telerik.Reporting.Drawing.SizeU CalculateSize(Telerik.Reporting.Processing.TextBox textBox)
{
    int len = textBox.DataObject["Name"].ToString().Length;
    double width = len * 6; //this is pseudo calculation
    return new Telerik.Reporting.Drawing.SizeU(Telerik.Reporting.Drawing.Unit.Pixel(width), textBox.Size.Height);
}

I try to modify font size of a textbox dynamically depending of text length but when I use this user function, I have and error message : 

System.NullReferenceException : 'Object reference not set to an instance of an object.'
Telerik.Reporting.Processing.IDataObject.this[string].get retournée null.

I have set the binding as describe above and when I debug I have my textbox which is passed to the function. I don't understand why I can't get the value of the textbox. For information, i'm passing an object to the report and the textbox is binded to a field of this object. I execute RenderReport ( To generate a PDF ).

Do you have an idea ?

Thank you

[Peter]

Hello Alexandre,

According the code the data source should provide field with name "Name". If such field is not available replace the named indexer in the code snippet with the available field in this line:

int len = textBox.DataObject["Name"].ToString().Length;

Regards,
Peter
Progress Telerik