get only selected rows count in Gridview

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Hi,

I have a gridview i can get the total records count by
below code

GridView1.Rows.count

but in my grid i have check boxes and i have a button out side the grid. when i click on the button i want to get the count of only selected rows with checkboxes in the grid. how can we do that?

Thanks in Advance

Posted 29-Jul-10 5:17am

yadlaprasad

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4 solutions

Solution 1

You need to loop through all the rows of the Grid.
1. Find the checkbox control in each row
2. Find the state of checkbox. If chekced then increment the counter.

Once loop ends, show the count as selected number of rows.

Posted 29-Jul-10 5:35am

Sandeep Mewara

Comments

koool.kabeer 29-Jul-10 11:43am

yeah looping through the rows of gridview

Solution 4

Create a public Static method in YourForm.aspx.cs

C#

public static String CreateCheckBox(Int32 index)
{
    ///Return a checkbox created with dynamic ID
    return "<input type="\"checkbox\"" id="\"Chk_"" index="" hold=" /> " onclick="\"checkSelection()\"" />";
}

Create a item template in gridView... like this

HTML

<TemplateField HeaderText="">
<ItemTemplate HorizontalAlign="Left" />
<ItemTemplate>
<%#YourNamespace.YourForm.CreateCheckBox(Container.DisplayIndex)%>
</ItemTemplate>
</TemplateField>

Add the javascript function (On click) of the checkboxes

JavaScript

function checkSelection() {
var nMarked = 0;
for (var i = 0; i < document.forms[0].elements.length; i++) {
if (document.forms[0].elements[i].checked &&
document.forms[0].elements[i].name.indexOf('Chk_') > -1) {
    nMarked = nMarked + 1;
}
}
if (nMarked == 0) {
    alert("no element has been selected");
    return;
 }
else
{
    alert("You have selected " + nMarked + " checkboxes");
    //Do other stuff here
}
}

tell me what hapened ;)

Posted 29-Jul-10 11:21am

PunkIsNotDead

Solution 3

Hi makhaai,

thanks for your answer.. is there a way to check this count on client side using javascript?

Posted 29-Jul-10 5:54am

yadlaprasad

Comments

AspDotNetDev 29-Jul-10 11:57am

You can get the client ID of a control using control.ClientID. You can then use Javascript to find those controls by their ID and check if they are checked.

Sandeep Mewara 29-Jul-10 11:59am

Reason for my vote of 1
Not an answer. Should be a Comment to the answer you want to interact.

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raju melveetilpurayil · Accepted Answer · 2010-07-29T05:50:00

C#

protected void Button2_Click(object sender, EventArgs e)
    {
        if (GridView1.Rows.Count > 0)
        {
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                //finding checkbox in GridView
                CheckBox cbx = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
                //CheckBox not null
                if (cbx != null)
                {
                    //if CheckBox Checked
                    if (cbx.Checked)
                    {
                        //add your logic here.
                        //this is for example to get first column values of selected CheckBox
                        string firstColumnValue = GridView1.Rows[i].Cells[0].Text;
                        Response.Write(firstColumnValue);
                    }
                }
            }
        }
    }