Download Excel in blazor| export Excel in blazor c#| how to export data into Excel in blazor c#

 Download Excel in blazor| export Excel in blazor c#| how to export data into Excel in blazor c#

To enable downloading an Excel file in Blazor, you can utilize the capabilities of the `FileSaver.js` library along with the `ExcelJS` library. Here's a step-by-step guide on how to implement downloading an Excel file in Blazor:

1. Install the required NuGet packages: Install the `Blazor.FileReader` and `ExcelJS` NuGet packages in your Blazor project. The `Blazor.FileReader` package allows you to read files on the client-side, while the `ExcelJS` package provides functionalities for creating Excel files.

2. Add the necessary JavaScript interop: In your Blazor project, create a new JavaScript file, for example `excelInterop.js`, and add the following code:

javascript

window.saveAsExcelFile = (fileContent, fileName) => {

    const data = new Blob([fileContent], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });

    const url = window.URL.createObjectURL(data);

    const link = document.createElement('a');

    link.href = url;

    link.download = fileName;

    link.click();

    window.URL.revokeObjectURL(url);

};

This JavaScript code defines a `saveAsExcelFile` function that takes the file content and file name as parameters. It creates a Blob object with the file content, generates a download link, and triggers the download.

3. Create a Blazor component for generating the Excel file: Create a Blazor component, for example `ExcelGenerator.razor`, where you define the logic for generating the Excel file and triggering the download.

razor

@inject IJSRuntime jsRuntime

<button @onclick="GenerateExcel">Download Excel</button>

@code {

    private async Task GenerateExcel()

    {

        var workbook = new ExcelJS.Workbook();

        var worksheet = workbook.addWorksheet('Sheet 1');

        // Add data to the worksheet using ExcelJS library

        // Example: worksheet.getCell('A1').value = 'Hello, World!';

        var buffer = await workbook.xlsx.writeBuffer();

        var fileName = 'example.xlsx';

        await jsRuntime.InvokeVoidAsync('saveAsExcelFile', buffer, fileName);

    }

}

In this example, the `GenerateExcel` method is called when the button is clicked. It creates an instance of `ExcelJS.Workbook`, adds a worksheet, and populates the worksheet with data using the `ExcelJS` library. Finally, it writes the Excel file to a buffer, invokes the `saveAsExcelFile` JavaScript function, and passes the buffer and file name as parameters.

4. Import the JavaScript interop: In your `index.html` or `_Imports.razor` file, add the following import statement to import the JavaScript interop file:

html

<script src="excelInterop.js"></script>

Make sure the `excelInterop.js` file is in the same directory as your Blazor component.

By following these steps, you can generate and download an Excel file in Blazor. When the "Download Excel" button is clicked, the Excel file will be generated using the `ExcelJS` library, and the file will be downloaded to the user's device using the `FileSaver.js` library. You can customize the Excel generation logic based on your requirements, such as adding data, formatting, and formulas to the worksheet.

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Checkboxlist selected value get in blazor c#| get selected checkboxlist item values in blazor c#| checkboxlist in blazor

 Checkboxlist selected value get in blazor c#| get selected checkboxlist item values in blazor c#| checkboxlist in blazor 

To get the selected items from a checkbox list in Blazor, you can follow these steps:

1. Create a model for the items in your checkbox list: Create a class that represents the structure of each item in the list. This class should include properties for the item's value, display text, and a boolean property to indicate whether the item is selected or not.

csharp

public class CheckboxItem

{

    public string Value { get; set; }

    public string Text { get; set; }

    public bool IsSelected { get; set; }

}

2. Define a collection of checkbox items in your component: In your Blazor component, create a collection of `CheckboxItem` objects to populate the checkbox list.

csharp

private List<CheckboxItem> checkboxItems = new List<CheckboxItem>

{

    new CheckboxItem { Value = "1", Text = "Item 1", IsSelected = false },

    new CheckboxItem { Value = "2", Text = "Item 2", IsSelected = false },

    // Add more items as needed

};

3. Display the checkbox list in your component's markup: In your component's markup, use a loop to display each item in the checkbox list.

razor

@foreach (var item in checkboxItems)

{

    <label>

        <input type="checkbox" @bind="item.IsSelected" />

        @item.Text

    </label>

}

In this example, a loop is used to iterate through each item in the `checkboxItems` collection. Each item is displayed as a checkbox input with a corresponding label.

4. Get the selected items: To get the selected items from the checkbox list, you can use LINQ or iterate through the collection in your component's code.

Using LINQ:

csharp

var selectedItems = checkboxItems.Where(item => item.IsSelected).ToList();

In this example, the `Where` method is used to filter the `checkboxItems` collection based on the `IsSelected` property, and the selected items are stored in the `selectedItems` list.

Iterating through the collection:

csharp

var selectedItems = new List<CheckboxItem>();

foreach (var item in checkboxItems)

{

    if (item.IsSelected)

    {

        selectedItems.Add(item);

    }

}

In this example, a loop is used to iterate through each item in the `checkboxItems` collection. If an item's `IsSelected` property is `true`, it is added to the `selectedItems` list.

You can perform further processing or pass the `selectedItems` list to other methods as needed.

By following these steps, you can get the selected items from a checkbox list in Blazor by binding each checkbox to a boolean property in a model class and checking the `IsSelected` property of each item in your component's code.

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Use checkbox in blazor| how to check checkbox item is checked in blazor c#

 Use checkbox in blazor| how to check checkbox item is checked in blazor c#

In Blazor, you can check whether a checkbox is checked or not by binding it to a boolean property and accessing the property's value in your component's code.

 Here's an example:

1. Define a boolean property in your component's code:

csharp

private bool isChecked = false;

2. Bind the checkbox to the boolean property in your component's markup:

razor

<input type="checkbox" @bind="@isChecked" />

In this example, the `@bind` directive is used to bind the checkbox to the `isChecked` property. This establishes a two-way binding between the checkbox's checked state and the `isChecked` property.

3. Access the `isChecked` property in your component's code:

csharp

if (isChecked)

{

    // Checkbox is checked

    // Perform the desired logic

}

else

{

    // Checkbox is not checked

    // Perform alternative logic if needed

}

In your component's code, you can access the `isChecked` property and perform the desired logic based on its value. If `isChecked` is `true`, it means the checkbox is checked. If `isChecked` is `false`, it means the checkbox is not checked.

You can use the `isChecked` property in conditionals, pass it to other methods, or bind it to other UI elements to control their behavior based on the checkbox's state.

By following these steps, you can determine whether a checkbox is checked or not in Blazor by binding it to a boolean property and checking the property's value in your component's code.

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Upload file image or Excel in blazor| upload image in Excel| upload Excel in blazor c#| upload file in blazor

Upload file image or Excel in blazor| upload image in Excel| upload Excel in blazor c#| upload file in blazor 

To enable file uploads in Blazor, you can use the `InputFile` component provided by Blazor. The `InputFile` component allows users to select and upload files from their local system. Here's a step-by-step guide on how to implement file upload in Blazor:

1. Add the `InputFile` component to your component's markup: In your Blazor component's markup, add the `InputFile` component.

razor

<InputFile OnChange="HandleFileSelected" />

In this example, the `InputFile` component is added, and the `OnChange` event is bound to the `HandleFileSelected` method.

2. Handle the file selection event: In your component's code, create a method to handle the file selection event. This method will be triggered when a file is selected by the user.

csharp

private async Task HandleFileSelected(InputFileChangeEventArgs e)

{

    var file = e.File;

    // Process the file (e.g., upload to server, read contents, etc.)

    // You can access the file name, size, and content using properties like file.Name, file.Size, file.Data

    // You can also access the file content as a Stream using file.OpenReadStream()

    // Perform the necessary logic based on your requirements

}

In this example, the `HandleFileSelected` method is declared with the `async` keyword to allow asynchronous processing. The `InputFileChangeEventArgs` argument provides access to the selected file. You can perform the necessary logic with the file, such as uploading it to a server, reading its contents, or performing any custom processing.

3. Access file metadata and content: Inside the `HandleFileSelected` method, you can access various properties of the selected file, such as `file.Name`, `file.Size`, and `file.Data`. You can also access the file content as a `Stream` using `file.OpenReadStream()`. Use these properties and methods to perform the required operations on the selected file.

4. Optional: Display file information to the user: If you want to display the selected file information to the user, you can add HTML elements or Blazor components in your markup to present the relevant details.

razor

@if (file != null)

{

    <p>Selected file: @file.Name</p>

    <p>File size: @file.Size bytes</p>

}

In this example, the file information is displayed to the user if a file has been selected.

By following these steps, you can enable file uploads in Blazor using the `InputFile` component. You can handle the file selection event, access the file metadata and content, and perform the required processing based on your application's needs.

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Bind API data into Datagrid blazor| bind data from API to datagrid blazor| call API and bind in blazor Datagrid.

Bind API data into Datagrid blazor| bind data from API to datagrid blazor| call API and bind in blazor Datagrid.

To bind data from an API to a DataGrid in Blazor, you need to follow these steps:

1. Create a model for your API response: Create a class that represents the structure of the data returned by the API. The properties in this class should match the fields in the API response.

csharp

public class ApiResponseModel

{

    public int Id { get; set; }

    public string Name { get; set; }

    public int Age { get; set; }

    // Add other properties as needed

}

2. Inject the `HttpClient` service: In your Blazor component, inject the `HttpClient` service using the `@inject` directive.

csharp

@inject HttpClient httpClient

3. Retrieve data from the API: In your component's code, create a method to retrieve the data from the API using the `HttpClient` service.

csharp

private async Task<List<ApiResponseModel>> GetDataFromApi()

{

    var response = await httpClient.GetFromJsonAsync<List<ApiResponseModel>>("https://api.example.com/data");

    return response;

}

In this example, the `GetDataFromApi` method uses the `GetFromJsonAsync` method of `HttpClient` to send a GET request to the specified API endpoint and retrieve the data. The response is deserialized into a list of `ApiResponseModel` objects.

4. Bind the DataGrid to the API data: In your component's markup, use the `DataGrid` component and bind it to the API data.

razor

<DataGrid Data="@apiData">

    <DataGridColumns>

        <DataGridColumn Field="@nameof(ApiResponseModel.Name)" Title="Name" />

        <DataGridColumn Field="@nameof(ApiResponseModel.Age)" Title="Age" />

        <!-- Add other columns as needed -->

    </DataGridColumns>

</DataGrid>

In this example, the `Data` property of the `DataGrid` component is bound to the `apiData` property in your component. The `DataGridColumns` section defines the columns to be displayed in the grid, and each `DataGridColumn` specifies the field to bind to and the column title.

5. Load the data in your component: In the `OnInitializedAsync` method or any other suitable lifecycle method of your component, call the `GetDataFromApi` method and assign the returned data to the `apiData` property.

csharp

private List<ApiResponseModel> apiData;

protected override async Task OnInitializedAsync()

{

    apiData = await GetDataFromApi();

}

In this example, the `OnInitializedAsync` method is overridden, and the `GetDataFromApi` method is called to retrieve the data and assign it to the `apiData` property.

By following these steps, you can bind data from an API to a DataGrid in Blazor. The `HttpClient` service allows you to fetch the data from the API, and the `DataGrid` component takes care of displaying the data in a tabular format.

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Bind Datagrid with edit and delete action in blazor c#| Edit data in blazor c#| Delete Data in blazor Datagrid

 Bind Datagrid with edit and delete action in blazor c#| Edit data in blazor c#| Delete Data in blazor Datagrid 

To bind a grid in Blazor with edit and delete actions, you can use the `DataGrid` component and customize the columns to include buttons or links for the edit and delete actions. Here's an example of how you can achieve this:

1. Define a model for your data: Create a class to represent the data structure for your grid. This class should have properties that correspond to the columns of your grid.

csharp

public class GridItem

{

    public int Id { get; set; }

    public string Name { get; set; }

    public int Age { get; set; }

    // Add other properties as needed

}

2. Create a collection of data: In your Blazor component, create a collection of data to populate the grid. This collection should contain instances of the model class defined in the previous step.

csharp

private List<GridItem> gridData = new List<GridItem>

{

    new GridItem { Id = 1, Name = "John", Age = 25 },

    new GridItem { Id = 2, Name = "Jane", Age = 30 },

    // Add more data items

};

3. Add the `DataGrid` component to your component's markup: In your component's markup, add the `DataGrid` component and specify the columns you want to display. Customize the columns to include buttons or links for the edit and delete actions.

razor

<DataGrid Items="@gridData">

    <DataGridColumns>

        <DataGridColumn Field="@nameof(GridItem.Name)" Title="Name" />

        <DataGridColumn Field="@nameof(GridItem.Age)" Title="Age" />

        <DataGridColumn Title="Actions">

            <Template>

                <button @onclick="@(context => EditItem(context))">Edit</button>

                <button @onclick="@(context => DeleteItem(context))">Delete</button>

            </Template>

        </DataGridColumn>

    </DataGridColumns>

</DataGrid>

In this example, a column titled "Actions" is added to the `DataGridColumns` section. Within the column, a template is used to define the buttons for the edit and delete actions. The `EditItem` and `DeleteItem` methods are bound to the respective button's `@onclick` event handler and receive the current item's context as an argument.

4. Implement the edit and delete actions: In your Blazor component, implement the logic for the edit and delete actions.

csharp

private void EditItem(GridItem item)

{

    // Perform edit logic for the selected item

}

private void DeleteItem(GridItem item)

{

    // Perform delete logic for the selected item

    gridData.Remove(item); // Example: Remove the item from the collection

}

In the `EditItem` and `DeleteItem` methods, you can implement the custom logic for the edit and delete actions based on the selected item. This can include updating the item, navigating to a different page, displaying confirmation dialogs, or making API requests.

By following these steps, you can bind a grid in Blazor with edit and delete actions. The `DataGrid` component provides the foundation for displaying the data, and you can customize the columns to include buttons or links for performing the desired actions on each row of the grid.

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Show data in grid blazor c#| display Data into table format in blazor c#| Datagrid in blazor| blazor Datagrid

 

Show data in grid blazor c#| display Data into table format in blazor c#| Datagrid in blazor| blazor Datagrid 

To bind a grid in Blazor, you can use the `DataGrid` component provided by Blazor. The `DataGrid` component enables you to display tabular data and perform sorting, paging, and other grid-related operations. Here's a step-by-step guide on how to bind a grid in Blazor:

1. Define a model for your data: Create a class to represent the data structure for your grid. This class should have properties that correspond to the columns of your grid.

   csharp

   public class GridItem

   {

       public string Name { get; set; }

       public int Age { get; set; }

       // Add other properties as needed

   }

   

2. Create a collection of data: In your Blazor component, create a collection of data to populate the grid. This collection should contain instances of the model class defined in the previous step.

   csharp

   private List<GridItem> gridData = new List<GridItem>

   {

       new GridItem { Name = "John", Age = 25 },

       new GridItem { Name = "Jane", Age = 30 },

       // Add more data items

   };

   

3. Add the `DataGrid` component to your component's markup: In your component's markup, add the `DataGrid` component and specify the columns you want to display. Bind the `Items` property of the `DataGrid` to your collection of data.

   razor

   <DataGrid Items="@gridData">

       <DataGridColumns>

           <DataGridColumn Field="@nameof(GridItem.Name)" Title="Name" />

           <DataGridColumn Field="@nameof(GridItem.Age)" Title="Age" />

           <!-- Add other columns as needed -->

       </DataGridColumns>

   </DataGrid>

   

   In this example, the `Items` property of the `DataGrid` component is bound to the `gridData` collection. The `DataGridColumns` section defines the columns to be displayed in the grid. Each `DataGridColumn` specifies the field to bind to and the column title.

4. Customize the grid appearance and behavior (optional): You can customize the appearance and behavior of the grid by using various properties and events provided by the `DataGrid` component. For example, you can set the `PageSize` to control the number of items displayed per page, handle the `OnSortChanged` event to perform custom sorting logic, and more.

   razor

   <DataGrid Items="@gridData" PageSize="10" OnSortChanged="HandleSortChanged">

       <!-- Column definitions -->

   </DataGrid>

   

   In this example, the `PageSize` property is set to 10, which means the grid will display 10 items per page. The `OnSortChanged` event is bound to the `HandleSortChanged` method, which can be implemented in your component to handle custom sorting logic.

By following these steps, you can bind a grid in Blazor and display data in a tabular format. The `DataGrid` component takes care of rendering the grid, handling paging, and providing a user-friendly interface for interacting with the data.

Thanks for learning. Happy learning..

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