英文:
MudBlazor: how to return parameter to a caller?
问题
我有一个MudDialog，它获取输入参数。它运行正常。
如何从对话框中返回值？
即输出参数等。
例如，它设置了内部的字符串，我想在调用后获取。
英文:
I have a MudDialog which get input parameters. It works fine.
How can I return values from the dialog?
I.e. output parameter etc.
For example it sets string inside and I'd like to get after call.
答案1
得分: 3
你可以在MudDialogInstance的级联参数上调用MudDialog.Close(DialogResult.Ok(...))来将值返回给调用者。
一个快速演示：
InputDialog.razor
<MudDialog>
<TitleContent>
<MudText Typo="Typo.h6">输入一些文本</MudText>
</TitleContent>
<DialogContent>
<MudTextField T="string" @bind-Value="@this.input" Immediate="@true"/>
</DialogContent>
<DialogActions>
<MudButton
Disabled="@string.IsNullOrWhiteSpace(this.input)"
OnClick="@this.OK"
Size="@Size.Small">
确定
</MudButton>
</DialogActions>
</MudDialog>
@code {
private string input = string.Empty;
[CascadingParameter]
private MudDialogInstance MudDialog { get; set; } = default!;
private void OK() => this.MudDialog.Close(DialogResult.Ok(this.input));
}
像这样使用它：
Main.razor
<MudGrid>
<MudItem sm="12">
<MudButton OnClick="@this.Prompt" Color="Color.Default">提示</MudButton>
<MudText>输入：@this.input</MudText>
</MudItem>
</MudGrid>
@code {
private string input = string.Empty;
[Inject]
private IDialogService DialogService { get; set; } = default!;
private async Task Prompt()
{
var options = new DialogOptions
{
CloseButton = true,
DisableBackdropClick = false,
MaxWidth = MaxWidth.Small
};
var result = await this.DialogService.Show<InputDialog>(string.Empty, new DialogParameters(), options).Result;
this.input = result.Data as string ?? string.Empty;
}
}
在此处测试它：https://try.mudblazor.com/snippet/wOwRuQvUyTIflERS
英文:
You can call MudDialog.Close(DialogResult.Ok(...)) on the MudDialogInstance cascading parameter to return a value back to the caller.
A quick demo:
InputDialog.razor
<MudDialog>
<TitleContent>
<MudText Typo="Typo.h6">Enter some text</MudText>
</TitleContent>
<DialogContent>
<MudTextField T="string" @bind-Value="@this.input" Immediate="@true"/>
</DialogContent>
<DialogActions>
<MudButton
Disabled="@string.IsNullOrWhiteSpace(this.input)"
OnClick="@this.OK"
Size="@Size.Small">
OK
</MudButton>
</DialogActions>
</MudDialog>
@code {
private string input = string.Empty;
[CascadingParameter]
private MudDialogInstance MudDialog { get; set; } = default!;
private void OK() => this.MudDialog.Close(DialogResult.Ok(this.input));
}
Use it like this:
Main.razor
<MudGrid>
<MudItem sm="12">
<MudButton OnClick="@this.Prompt" Color="Color.Default">Prompt</MudButton>
<MudText>Input: @this.input</MudText>
</MudItem>
</MudGrid>
@code {
private string input = string.Empty;
[Inject]
private IDialogService DialogService { get; set; } = default!;
private async Task Prompt()
{
var options = new DialogOptions
{
CloseButton = true,
DisableBackdropClick = false,
MaxWidth = MaxWidth.Small
};
var result = await this.DialogService.Show<InputDialog>(string.Empty, new DialogParameters(), options).Result;
this.input = result.Data as string ?? string.Empty;
}
}
Test it here: https://try.mudblazor.com/snippet/wOwRuQvUyTIflERS
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