How to add class or inline styles in Blazor component?

Question

This is interesting one,
I have a single parent and 4 child components. I want to place these 4 child components as per their X and Y coordinates, meaning as per CSS, every child will have something like this.

position:absolute;
left: 390px;
top: 120px;

For now I can achieve the placement by setting the style in parent.

        <div class="divStyle1">
             <UserDefinedChildComponent></UserDefinedChildComponent>
        </div>
        <div class="divStyle2">
            <UserDefinedChildComponent></UserDefinedChildComponent>
        </div>
        <div class="divStyle3">
            <UserDefinedChildComponent></UserDefinedChildComponent>
        </div>
        <div class="divStyle4">
            <UserDefinedChildComponent></UserDefinedChildComponent>
        </div>
}


<style>
    .divStyle1 {  
    position:absolute;
    left: 258px;
    top: 120px;
  }
    .divStyle2 {  
    position:absolute;
    left: 390px;
    top: 120px;
  }
    .divStyle3 {  
    position:absolute;
    left: 258px;
    top: 170px;
  }
    .divStyle4 {  
    position:absolute;
    left: 390px;
    top: 170px;
  }
</style>

I want to set style without wrapping <UserDefinedChildComponent> inside a <div>

Hope I was clear with my doubt.

Answer 1

Hi @Rikam Palkar ,

I want to set style without wrapping <UserDefinedChildComponent> inside a <div>

You can try to add the div in the UserDefinedChildComponent component, then add a parameter to set the class style. Refer the following sample:

1. According to the button style, create a CustomAttributes model:

   public class CustomAttributes  
   {  
       public string Width { get; set; }  
       public string  Height { get; set; }  
       public string X { get; set; }  
       public string Y { get; set; }  
       public string FontSize { get; set; }  
   }  
   

2. The UserDefinedChildComponent component like this:

   @using BlazorWebAssembly.Models  
   <div class="@CustomClass">  
       <button class="buttonStyle">OK</button>      
   </div>  
    <style>  
      .buttonStyle {    
        position:absolute;  
        width: @Properties.Width;  
        height: @Properties.Height;  
        left: @Properties.X;  
        top: @Properties.Y;  
        font-size: @Properties.FontSize;  
      }  
     .divStyle1 {    
        position:absolute;  
        left: 258px;  
        top: 120px;  
      }  
        .divStyle2 {    
        position:absolute;  
        left: 390px;  
        top: 120px;  
      }  
        .divStyle3 {    
        position:absolute;  
        left: 258px;  
        top: 170px;  
      }  
        .divStyle4 {    
        position:absolute;  
        left: 390px;  
        top: 170px;  
      }  
    </style>   
   @code {  
       [Parameter]  
       public string CustomClass { get; set; }         
       [Parameter]  
       public CustomAttributes Properties { get; set; } = new () { Width = "200px", Height = "50px", FontSize = "15px", X = "100px", Y = "50px" };  
   
    }  
   

3. In the main page, use the following code to add child components:

   <div class="container">      
       <UserDefinedChildComponent CustomClass ="divStyle1" ></UserDefinedChildComponent>   
       <UserDefinedChildComponent CustomClass ="divStyle2" ></UserDefinedChildComponent>    
       <UserDefinedChildComponent CustomClass ="divStyle3" ></UserDefinedChildComponent>    
       <UserDefinedChildComponent CustomClass ="divStyle4" ></UserDefinedChildComponent>          
   </div>  
   

   The result like this:

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Best regards,
Dillion