Question
Answer and Explanation
To use Blazor's EditForm with a string value, you'll typically bind the EditForm to a model that contains the string. However, if you want to directly bind the EditForm to a single string, you can create a simple model to encapsulate it.
Here’s a step-by-step guide:
1. Create a Simple Model:
Create a class that holds the string value. This class will serve as the model for your EditForm.
public class StringModel
{
public string Value { get; set; }
}
2. Instantiate the Model:
In your Blazor component, create an instance of this model and initialize the string value.
@code {
private StringModel model = new StringModel { Value = "Initial Value" };
private void HandleValidSubmit()
{
Console.WriteLine("Submitted Value: " + model.Value);
}
}
3. Use the EditForm:
Bind the EditForm to the model you created. Use @bind-Value on an InputText component to bind it to the string property in your model.
<EditForm Model="@model" OnValidSubmit="HandleValidSubmit">
<DataAnnotationsValidator />
<ValidationSummary />
<div class="form-group">
<label for="stringValue">String Value:</label>
<InputText id="stringValue" class="form-control" @bind-Value="model.Value" />
<ValidationMessage For="@(() => model.Value)" />
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</EditForm>
4. Handle Form Submission:
Implement the HandleValidSubmit method to process the string value when the form is submitted.
Complete Example:
Here's a complete Blazor component:
@page "/"
<EditForm Model="@model" OnValidSubmit="HandleValidSubmit">
<DataAnnotationsValidator />
<ValidationSummary />
<div class="form-group">
<label for="stringValue">String Value:</label>
<InputText id="stringValue" class="form-control" @bind-Value="model.Value" />
<ValidationMessage For="@(() => model.Value)" />
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</EditForm>
@code {
private StringModel model = new StringModel { Value = "Initial Value" };
private void HandleValidSubmit()
{
Console.WriteLine("Submitted Value: " + model.Value);
}
public class StringModel
{
[Required(ErrorMessage = "Value is required.")]
public string Value { get; set; }
}
}
In this example, the StringModel class encapsulates the string value, and the EditForm is bound to an instance of this class. The InputText component uses @bind-Value to create a two-way binding between the input field and the string property. Validation is also included to ensure the string is not empty when the form is submitted.