How to set width of mat-table column in angular?

问题

Here in my mat-table have 6 column when any column has not more words then it looks like Image-1, but when any column has more words then UI looks like Image-2, so how to set UI like Image-1 when any column has more words in angular 6 ?

Image-1

Image-2

user.component.html

<div class="mat-elevation-z8">      
 <table mat-table [dataSource]="dataSource">
  <ng-container matColumnDef="userimage">
    <th mat-header-cell *matHeaderCellDef> # </th>
    <td mat-cell *matCellDef="let element"> 
      <img src="{{commonUrlObj.commonUrl}}/images/{{element.userimage}}" style="height: 40px;width: 40px;"/>
    </td>
  </ng-container>

  <ng-container matColumnDef="username">
    <th mat-header-cell *matHeaderCellDef> Full Name </th>
    <td mat-cell *matCellDef="let element"> {{element.username}} ( {{element.usertype}} )</td>
  </ng-container>

  <ng-container matColumnDef="emailid">
    <th mat-header-cell *matHeaderCellDef> EmailId </th>
    <td mat-cell *matCellDef="let element"> {{element.emailid}} </td>
   </ng-container>

  <ng-container matColumnDef="contactno">
    <th mat-header-cell *matHeaderCellDef> Contact No. </th>
    <td mat-cell *matCellDef="let element"> {{element.contactno}} </td>
  </ng-container>

  <ng-container matColumnDef="enabled">
    <th mat-header-cell *matHeaderCellDef> Enabled </th>
    <td mat-cell *matCellDef="let element" style="color: blue">
      <ng-container *ngIf="element.enabled == 'true'; else otherss">Enabled</ng-container>
        <ng-template #otherss>Disabled</ng-template>
    </td>
  </ng-container>

  <ng-container matColumnDef="action">
    <th mat-header-cell *matHeaderCellDef> Action </th>
      <td mat-cell *matCellDef="let element" fxLayoutGap="5px">
        <button mat-mini-fab color="primary" routerLink="/base/editUserDetails/{{element.userid}}"><mat-icon>edit</mat-icon></button>
        <button mat-mini-fab color="primary" routerLink="/base/viewUserDetails/{{element.userid}}"><mat-icon>pageview</mat-icon></button>
      </td>
  </ng-container>

  <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
  <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
<mat-paginator [pageSizeOptions]="[5, 10, 20, 50 ,100]" showFirstLastButtons></mat-paginator>

回答1:

using css we can adjust specific column width which i put in below code.

user.component.css

table{
 width: 100%;
}

.mat-column-username {
  word-wrap: break-word !important;
  white-space: unset !important;
  flex: 0 0 28% !important;
  width: 28% !important;
  overflow-wrap: break-word;
  word-wrap: break-word;

  word-break: break-word;

  -ms-hyphens: auto;
  -moz-hyphens: auto;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.mat-column-emailid {
  word-wrap: break-word !important;
  white-space: unset !important;
  flex: 0 0 25% !important;
  width: 25% !important;
  overflow-wrap: break-word;
  word-wrap: break-word;

  word-break: break-word;

  -ms-hyphens: auto;
  -moz-hyphens: auto;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.mat-column-contactno {
  word-wrap: break-word !important;
  white-space: unset !important;
  flex: 0 0 17% !important;
  width: 17% !important;
  overflow-wrap: break-word;
  word-wrap: break-word;

  word-break: break-word;

  -ms-hyphens: auto;
  -moz-hyphens: auto;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.mat-column-userimage {
  word-wrap: break-word !important;
  white-space: unset !important;
  flex: 0 0 8% !important;
  width: 8% !important;
  overflow-wrap: break-word;
  word-wrap: break-word;

  word-break: break-word;

  -ms-hyphens: auto;
  -moz-hyphens: auto;
  -webkit-hyphens: auto;
  hyphens: auto;
}

.mat-column-userActivity {
  word-wrap: break-word !important;
  white-space: unset !important;
  flex: 0 0 10% !important;
  width: 10% !important;
  overflow-wrap: break-word;
  word-wrap: break-word;

  word-break: break-word;

  -ms-hyphens: auto;
  -moz-hyphens: auto;
  -webkit-hyphens: auto;
  hyphens: auto;
}

回答2:

If you're using scss for your styles you can use a mixin to help generate the code. Your styles will quickly get out of hand if you put all the properties every time.

This is a very simple example - really nothing more than a proof of concept, you can extend this with multiple properties and rules as needed.

@mixin mat-table-columns($columns)
{
    .mat-column-
    {
        @each $colName, $props in $columns {

            $width: map-get($props, 'width');

            &#{$colName} 
            {
                flex: $width;
                min-width: $width;

                @if map-has-key($props, 'color') 
                {
                    color: map-get($props, 'color');
                }
            }  
        }
    }
}

Then in your component where your table is defined you just do this:

@include mat-table-columns((

    orderid: (width: 6rem, color: gray),
    date: (width: 9rem),
    items: (width: 20rem)

));

This generates something like this:

.mat-column-orderid[_ngcontent-c15] {
  flex: 6rem;
  min-width: 6rem;
  color: gray; }

.mat-column-date[_ngcontent-c15] {
  flex: 9rem;
  min-width: 9rem; }

In this version width becomes flex: value; min-width: value.

For your specific example you could add wrap: true or something like that as a new parameter.

回答3:

You can do it by using below CSS:

table {
  width: 100%;
  table-layout: fixed;
}

th, td {
  overflow: hidden;
  width: 200px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

Here is a StackBlitz Example with Sample Data

回答4:

we can add attribute width directly to th

eg:

<ng-container matColumnDef="position" >
    <th mat-header-cell *matHeaderCellDef width ="20%"> No. </th>
    <td mat-cell *matCellDef="let element"> {{element.position}} </td>
  </ng-container>

来源：https://stackoverflow.com/questions/53020792/how-to-set-width-of-mat-table-column-in-angular