Get GridView selected row DataKey in Javascript

I have GridView which I can select a row. I then have a button above the grid called Edit which the user can click to popup a window and edit the selected row. So the button will have Javascript code behind it along the lines of

function editRecord()
{
  var gridView = document.getElementById("<%= GridView.ClientID %>");
  var id = // somehow get the id here ???
  window.open("edit.aspx?id=" + id);
}

The question is how do I retrieve the selected records ID in javascript?

From stackoverflow Craig

• 1) change your javascript function to use a parameter

  function editRecord(clientId)
  { ....
  

  2) output the call in your editRecord button... if you want to avoid dealing with the .net generated ids, just use a simple

  <input type="button" onclick="editRecord(your-rows-client-id-goes-here)" />
  

  Craig : This works if I have an edit button on every row. But I only have 1 edit button on the whole page on a toolbar above the grid. So the workflow is someone selects a record and then clicks edit on the toolbar. There is no way to pass the id to the editRecord function.

  Dave K : I agree with JasonS below as a good approach.

  Eric : how can i get the rows client id here, Dave?
  From Dave K

• Based off of your comments to @DaveK's response, in javascript you can set the id of a hidden field to the clientId of the selected row when the user selects it. Then have your editRecord function use the value set on the hidden form field.

  From JasonS

• I worked it out based on JasonS response. What I did was create a hidden field in the Grid View like this:

  <asp:TemplateField ShowHeader="False">
      <ItemTemplate>
        <asp:HiddenField ID="hdID" runat="server" Value='<%# Eval("JobID") %>' />
      </ItemTemplate>
  </asp:TemplateField>
  <asp:TemplateField Visible="False">
      <ItemTemplate>
        <asp:LinkButton ID="lnkSelect" runat="server" CommandName="select" Text="Select" />
      </ItemTemplate>
  </asp:TemplateField>
  

  Then on the OnRowDataBind have code to set the selected row

  protected virtual void Grid_RowDataBound(object sender, GridViewRowEventArgs e)
  {
      if (e.Row.RowType == DataControlRowType.DataRow)
      {
          // Click to highlight row
          Control lnkSelect = e.Row.FindControl("lnkSelect");
          if (lnkSelect != null)
          {
              StringBuilder click = new StringBuilder();
              click.AppendLine(m_View.Page.ClientScript.GetPostBackClientHyperlink(lnkSelect, String.Empty));
              click.AppendLine(String.Format("onGridViewRowSelected('{0}')", e.Row.RowIndex));
              e.Row.Attributes.Add("onclick", click.ToString());
          }
      }            
  }
  

  And then in the Javascript I have code like this

  <script type="text/javascript">
  
  var selectedRowIndex = null;
  
  function onGridViewRowSelected(rowIndex)
  {        
      selectedRowIndex = rowIndex;
  }
  
  function editItem()
  {   
      if (selectedRowIndex == null) return;
  
      var gridView = document.getElementById('<%= GridView1.ClientID %>');                
      var cell = gridView.rows[parseInt(selectedRowIndex)+1].cells[0];        
      var hidID = cell.childNodes[0];        
      window.open('JobTypeEdit.aspx?id=' + hidID.value);
  }
  
  </script>
  

  Works a treat :-)

  EndangeredMassa : That's basically how I do this.
  From Craig

• i want to take gridview cell value in javascript

  From aryan

• This solution works great! Thanks! Solved an issue so soon.

  From deepa