如何在Blazor客户端应用程序中使用Bootstrap模态? [英] How to use Bootstrap modal in Blazor client app?

问题描述

我试图显示引导程序模式，然后绑定其按钮.但是我无法通过显示模态的第一步.我正在使用.net core 3.1的Blazor客户端模板.我有一个名为Modal.razor的页面，其中包含从getbootstrap.com找到的引导程序模式.

I am trying to show bootstrap modal then bind its buttons. But I cannot pass the first step showing the modal. I am using Blazor client template of .net core 3.1. I have a page named Modal.razor which contains the bootstrap modal I found from getbootstrap.com.

@if (Show)
{
    <div class="modal" tabindex="-1" role="dialog">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Modal title</h5>
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    <p>Modal body text goes here.</p>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-primary">Save changes</button>
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                </div>
            </div>
        </div>
    </div>
}
@code {
    [Parameter]
    public bool Show { get; set; } = false;
}

我在index.razor文件中称模态

An I called the modal in the index.razor file

@page "/"

<button @onclick="(()=>switchModal=!switchModal)">Switch Modal</button>

<Modal Show="switchModal"/>

@code{
    bool switchModal = false;
}

您可能会说应在此处调用StateHasChanged.但是，即使我将模式代码复制并粘贴到index.razor中，也看不到任何内容.

You might say StateHasChanged should be called here. But even if I copy and paste the modal code in the index.razor, I won't see anything.

推荐答案

可能有更好的方法，但这是一个使您入门的有效示例:

There is likely a better way to do this, but here's a working example to get you started:

页面:

@page "/modal-test"

<BlazorApp1.Components.Modal @ref="Modal"></BlazorApp1.Components.Modal>

<button @onclick="() => Modal.Open()">Open Modal</button>

@code {
    private BlazorApp1.Components.Modal Modal { get; set; }
}

组件:

<div class="modal @ModalClass" tabindex="-1" role="dialog" style="display:@ModalDisplay">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Modal title</h5>
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <p>Modal body text goes here.</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-primary">Save changes</button>
                <button type="button" class="btn btn-secondary" data-dismiss="modal" @onclick="() => Close()">Close</button>
            </div>
        </div>
    </div>
</div>


@if (ShowBackdrop)
{
    <div class="modal-backdrop fade show"></div>
}


@code {


  public Guid Guid = Guid.NewGuid();
    public string ModalDisplay = "none;";
    public string ModalClass = "";
    public bool ShowBackdrop = false;

    public void Open()
    {
        ModalDisplay = "block;";
        ModalClass = "Show";
        ShowBackdrop = true;
        StateHasChanged();
    }

    public void Close()
    {
        ModalDisplay = "none";
        ModalClass = "";
        ShowBackdrop = false;
        StateHasChanged();
    }
}

解决此问题的另一种方法是使用JSInterop调用$('#modalId').modal()

Another option to go about this, would be to use JSInterop to call $('#modalId').modal()

通过执行以下操作，可以使组件的每个版本都有唯一的ID: <div id="bootstrap-modal-@Guid"然后使用保存的ID通过jQuery调用.modal().

You could have each version of the component have a unique id by doing something like this: <div id="bootstrap-modal-@Guid" then use the saved ID to call .modal() with jQuery.

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