根据同一行中另一个文本字段中的值更改文本字段的值

Question

我正在使用具有文本字段作为单元格的Yii CGridView。我用CHtml :: textField显示文本字段。现在我想更新同一行中另一个单元格的值更改中的单元格。同一行中的文本字段的ID具有相同的编号。例如ProjectMBookGrid_length_163和ProjectMBookGrid_quantity_163。在更改ProjectMBookGrid_length_163值时，我想更改ProjectMBookGrid_quantity_163中的值，更改ProjectMBookGrid_length_164值时，我想要更改ProjectMBookGrid_quantity_164中的值。 JS小提琴在https://jsfiddle.net/7ykdkgaw/

<table> 
    <tr><td><input type="text" id="ProjectMBookGrid_length_163" name="ProjectMBookGrid[length_163]" value="5" style="text-align: right" class="gridfield"></td><td><input type="text" id="ProjectMBookGrid_quantity_163" name="ProjectMBookGrid[quantity_163]" value="3" style="text-align: right" class="gridfield"></td></tr> 
    <tr><td><input type="text" id="ProjectMBookGrid_length_162" name="ProjectMBookGrid[length_162]" value="3" style="text-align: right" class="gridfield"></td><td><input type="text" id="ProjectMBookGrid_quantity_162" name="ProjectMBookGrid[quantity_162]" value="3" style="text-align: right" class="gridfield"></td></tr> 
</table> 

Answer 1

请看看更新的小提琴：

https://jsfiddle.net/7ykdkgaw/2/

$(document).ready(function(){ 
    $(document).on("change","input[id^=ProjectMBookGrid_length_]", 
     function(){ 
      var currentVal = $(this).val(); 
      var currentId = $(this).attr("id"); 
      var numberInID = currentId.replace("ProjectMBookGrid_length_",""); 

      var targetText = $("#ProjectMBookGrid_quantity_"+numberInID); 
      targetText.val(currentVal); 
     }); 

});