datagrid counts rows based on selection

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A checkbox control is added to the datagrid. Is it possible to achieve such a function. That is: a variable is defined but the variable is increased by 1 when a checkbox is selected and subtracted by 1 when deselected. I.e. calculate the number of selected rows in real time

wsry82

can
Can be achieved with js

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Please give pointers

养狗的上帝

After binding, add onclick event processing on Checkbox.
datagrid1.DataSource=dt;
datagrid1.DataBind();

for(int i=0;i<datagrid1.Items.Count;i++)
{
   CheckBok ck=(CheckBox)datagrid1.Items[i].FindControl("checkbox1");
   if(ck!=nul)
   {
       ck.Attributes.Add("onclick","CheckClick();return false;");
   }
}

As for the preparation of Js, please refer to some JS manuals for yourself

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Thank you for your guidance and experiment