Links
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# Blazor server
dotnet new blazorserver -o [project-name] --no-https
cd [project-name]
dotnet run
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Solution Blazor / Webapi
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# create item/item.sln
dotnet new sln -o item
cd item
dotnet new blazorserver -o item.blazor --no-https
dotnet new webapi -o item.webapi --no-https
dotnet sln add item.blazor/item.blazor.csproj
dotnet sln add item.webapi/item.webapi.csproj
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| item/.vscode/tasks.json
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{
"version": "2.0.0",
"tasks": [
{
"label": "build blazor",
"command": "dotnet",
"type": "process",
"args": [
"build",
"${workspaceFolder}/item.blazor/item.blazor.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "build webapi",
"command": "dotnet",
"type": "process",
"args": [
"build",
"${workspaceFolder}/item.webapi/item.webapi.csproj",
"/property:GenerateFullPaths=true",
"/consoleloggerparameters:NoSummary"
],
"problemMatcher": "$msCompile"
},
{
"label": "build all",
"dependsOn": [
"build blazor",
"build webapi"
],
"group": "build",
"problemMatcher": []
}
]
}
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| item/.vscode/launch.json
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{
"version": "0.2.0",
"configurations": [
{
"name": "blazor",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build blazor",
"program": "${workspaceFolder}/item.blazor/bin/Debug/net6.0/item.blazor.dll",
"args": [],
"cwd": "${workspaceFolder}/item.blazor",
"stopAtEntry": false,
"serverReadyAction": {
"action": "openExternally",
"pattern": "\\bNow listening on:\\s+(https?://\\S+)"
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceFolder}/Views"
}
},
{
"name": "webapi",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build webapi",
"program": "${workspaceFolder}/item.webapi/bin/Debug/net6.0/item.webapi.dll",
"args": [],
"cwd": "${workspaceFolder}/item.webapi",
"stopAtEntry": false,
"serverReadyAction": {
"action": "openExternally",
"pattern": "\\bNow listening on:\\s+(https?://\\S+)"
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceFolder}/Views"
}
}
],
"compounds": [
{
"name": "blazor / webapi",
"configurations": [
"blazor",
"webapi"
],
"preLaunchTask": "build all"
}
]
}
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Pages
| Pages/Items.razor
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@* url *@
@page "/items"
@* url with a parameter *@
@page "/item/{id:int}"
<PageTitle>Items</PageTitle>
@* wait for the Items to be loaded *@
@if (items == null)
{
<p><em>Loading...</em></p>
}
else
{ /* ... */ }
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| Pages/Items.razor.cs
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public partial class Items : ComponentBase
{
private IReadOnlyCollection<ItemDto> items;
[Parameter]
public int Id { get; set; }
protected override async Task OnInitializedAsync()
{
items = await this.ItemClient.GetAsync();
}
}
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| Pages/Items.razor.css
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/* scoped css only for this page */
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Static files
| Pages/_Layout.cshtml
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<head>
<link href="css/site.css" rel="stylesheet" />
<link href="{AssemblyName}.styles.css" rel="stylesheet" /> @* active CSS isolation *@
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| wwwroot/css/site.css
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/* only CSS for the entire app, not a specific page */
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LibMan is a library manager
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# install the LibMan CLI
dotnet tool install -g Microsoft.Web.LibraryManager.Cli
# create a libman.js file
libman init
# available providers: cdnjs, jsdelivr, unpkg, filesystem
# install bootstrap, only bootstrap.min.css and bootstrap.bundle.min.js
libman install bootstrap@5.0.1 --files dist/css/bootstrap.min.css --files dist/js/bootstrap.bundle.min.js
# default destination path: wwwroot/lib/bootstrap
libman install bootswatch@5.0.1 --files dist/darkly/bootstrap.min.css
# uninstall bootstrap
libman uninstall bootstrap@5.0.1
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One way
Changes made in the UI doesn't change the binded property.
The onchange event can be used to manually update the property.
| Fichier:Blazor.svg
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<input type="text" value="@Description"
@onchange=@((ChangeEventArgs __e) => Description = __e.Value.ToString())
@onchange=OnInputChanged />
@code {
string Description { get; set; } = "Text";
void OnInputChanged(ChangeEventArgs e) => Description = e.Value.ToString();
}
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Two way
| Fichier:Blazor.svg
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@* by default uses the on change event (focus lost) *@
<input type="text" @bind=Description />
@* change to on input event *@
<input type="text" @bind=Description @bind:event="oninput" />
@code {
string Description { get; set; } = "Text";
}
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| EditItem.razor
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@page "/edititem/{ItemId:int}"
@* to access to Model.Item *@
@using Model
<EditForm Model="@item"
OnValidSubmit="@HandleValidSubmitAsync"
OnInvalidSubmit="@HandleInvalidSubmitAsync">
<button type="submit">Save</button>
<button @onclick="Cancel">Cancel</button>
</EditForm>
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| EditItem.razor.cs
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[Parameter]
public int ItemId { get; set; }
[Inject]
private IItemDataService ItemDataService { get; set; }
private Item item = new Item();
protected override async Task OnInitializedAsync()
{
item = await ItemDataService.GetItemAsync(ItemId);
}
// when the submit button is clicked and the model is valid
private async Task HandleValidSubmitAsync()
{
await ItemDataService.UpdateItemAsync(item);
}
// when the submit button is clicked and the model is not valid
private async Task HandleInvalidSubmitAsync()
{
}
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Input Checkbox
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InputCheckbox requires a cascading parameter of type EditContext.
For example, you can use InputCheckbox inside an EditForm. |
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<div class="form-group row">
<label for="smoker"
class=" offset-sm-3">
<InputCheckbox id="smoker"
@bind-Value="Employee.Smoker">
</InputCheckbox>
Smoker
</label>
</div>
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To have a checkbox without an EditForm use input type="checkbox" instead:
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<label>
<input type="checkbox" @onchange=OnCheckboxValueChanged />
Text ...
</label>
@code {
private void OnCheckboxValueChanged(ChangeEventArgs e)
{
var checkboxValue = (bool)e.Value;
}
}
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