How to get number of rows in datagrid in javascript

Question

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C#

function GridVal() 
{
    var app_id = document.getElementById ('ctl00_contentMain_ddl_Approach').value;
                 if (app_id =="1008") 
                 {      
                   var cellInstr;
                   var cellInstr1;
                   var grid = document.getElementById("<%= QueGrid.ClientID %>");
                   var txt1 = document.getElementById("txt_QuestionAssessmentInstruction");  
                     for (i=1; i<=grid.rows.length; i++)
                        { 
                          alert("for");   
                          alert(i);                     
                          cellInstr = grid.rows[i].cells[4];                                 
                          alert(cellInstr);                              
                          var CInstruc = cellInstr.childNodes[0].value;
                              alert(CInstruc); 
                         if(CInstruc=="")
                         {
                           alert("if");   
                           alert("The field Question Instruction cannot be Empty");
                           cellInstr.childNodes[0].focus();
                           return false;
                         }
                       }
                 }
                 else
                 {
                   var cellInstr;                
                   var grid = document.getElementById("<%= BUGrid.ClientID %>");
                   var txt1 = document.getElementById("txtControlTI");       
                     for (i=0; i<grid.rows.length;>
                        {                              
                          cellInstr = grid.rows[i].cells[6];
                          alert(cellInstr);                             
                          var CInstruc = cellInstr.childNodes[0].value;                       
                             alert(CInstruc);
                         if(CInstruc=="")
                         {
                            alert("The field Control Instruction cannot be Empty");
                            cellInstr.childNodes[0].focus();
                            return false;
                         }                        
                       }
                      }
}

In my above code i have used QueGrid as datagrid i want to give alert msg for number of rows in datagrid how can i get number of rows for the grid

Posted 27-Jun-13 21:25pm

Member 9410081

Updated 27-Jun-13 21:34pm

Thanks7872

v3

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2013-06-27T22:36:00

Solution 2

Refer - ASP.NET GridView row count using Javascript[^].

JavaScript

var rowscount = document.getElementByID('<%=Gridview1.ClientID%>').rows.length;

alert(rowscount);

Posted 27-Jun-13 22:36pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Member 9410081 28-Jun-13 5:12am

i tried the other one stilll its not working

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 28-Jun-13 5:46am

Then put a debugger and see what is the problem. You can put that by adding the code debugger; inside javaScript code.

And yes, please see the Console Window of FireBug in FireFox, if there are any issues reported.

Mahesh Bailwal · Answer 2 · 2013-06-27T22:00:00

Solution 1

var grid = document.getElementById("<%=QueGrid.ClientID %>");
var rowCount = grid.getElementsByTagName('TR').length -1;

Posted 27-Jun-13 22:00pm

Mahesh Bailwal

Comments

Member 9410081 28-Jun-13 4:59am

i used the above code but it is giving following error.

Message: 'null' is null or not an object
Line: 160
Char: 1
Code: 0

Mahesh Bailwal 28-Jun-13 5:49am

Where are you using this script in Head section or in Body section of .aspx page

Mahesh Bailwal 28-Jun-13 6:05am

It seems like you trying to get row count before grid is fully loaded. Please add this script just before end of body tag in .aspx page.

**Nirav Prabtani** · Answer 3 · 2013-06-27T23:39:00

Try this ....:)

C#

DataTable dt = //configure datasource here 
GridView1.DataSource = dt;
GridView1.DataBind();

you can take a hiddenfield html control in your page and can assign its value when you bind your grid as

HiddenField1.value = GridView1.Rows.Count.ToString(); // HiddenField1 is your hiddent type with server tag



In your javascript you can get its value as

var count = document.getElementById('HiddenField1');

alert(count.value)