Ask Learn
Preview
Please sign in to use this experience.
Sign inTemplateControl.Eval Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides support for parsing and evaluating a data-binding expression against an object at run time.
Overloads
| Eval(String) |
Evaluates a data-binding expression. |
| Eval(String, String) |
Evaluates a data-binding expression using the specified format string to display the result. |
Evaluates a data-binding expression.
protected public:
System::Object ^ Eval(System::String ^ expression);protected internal object Eval(string expression);member this.Eval : string -> objProtected Friend Function Eval (expression As String) As ObjectParameters
- expression
- String
The navigation path from the container to the public property value to place in the bound control property.
Returns
An object that results from the evaluation of the data-binding expression.
Exceptions
The data-binding method can be used only for controls contained on a Page.
Remarks
The value of expression must evaluate to a public property.
The Eval method calls the DataBinder.Eval method using the GetDataItem method to resolve the object reference that the expression is evaluated against.
See also
Applies to
.NET Framework 4.8.1 and other versions
| Product | Versions |
|---|---|
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Evaluates a data-binding expression using the specified format string to display the result.
protected public:
System::String ^ Eval(System::String ^ expression, System::String ^ format);protected internal string Eval(string expression, string format);member this.Eval : string * string -> stringProtected Friend Function Eval (expression As String, format As String) As StringParameters
- expression
- String
The navigation path from the container to the public property value to place in the bound control property.
- format
- String
A .NET Framework format string to apply to the result.
Returns
A string that results from the evaluation of the data-binding expression and conversion to a string type.
Exceptions
The data-binding method can only be used for controls contained on a Page.
Remarks
The value of expression must evaluate to a public property.
The Eval method calls the Eval method using the GetDataItem method to resolve the object reference that the expression is evaluated against.
See also
Applies to
.NET Framework 4.8.1 and other versions
| Product | Versions |
|---|---|
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |