Reference specific checkbox in gridview

Question

I have a GridView which show data retrived from database. I've made TemplateField (CheckBox) to GridView with this code:

<asp:GridView ID="dbRecordsContent" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" OnSelectedIndexChanged="dbRecordsContent_SelectedIndexChanged">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:CheckBox ID="myCheckBox" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="title" HeaderText="title" SortExpression="title" />
        <asp:BoundField DataField="url" HeaderText="url" SortExpression="url" />
        <asp:BoundField DataField="category" HeaderText="category" SortExpression="category" />
        <asp:BoundField DataField="isChecked" HeaderText="isChecked" SortExpression="isChecked" />
    </Columns>
</asp:GridView>

My grid view looks like this:

enter image description here

My question is: How do I know which checkbox ID is checked? For example:

I want to delete 2nd row when I press "Delete" button. Of course I will check second Checkbox, but how do I know which record to delete? How to reference second checkbox in a code?

Karl Anderson · Accepted Answer · 2013-09-27 12:40:33Z

2

In your delete button's click event handler you need to loop through all the rows in the grid and if a check box is checked, then you need to perform your delete logic, like this:

protected void DeleteButton_Click(object sender, EventArgs e)
{
    foreach(GridViewRow row in dbRecordsContent.Rows)
    {
        // Only look for check boxes in data rows, ignoring header 
        // and footer rows
        if (row.RowType == DataControlRowType.DataRow)
        {
            if (((CheckBox)row.FindControl("myCheckBox")).Checked)
            {
                // Do delete logic here
            }
        }
    }
}

UPDATE:

To get the row number use the GridViewRow.RowIndex property, like this:

int rowNumber = row.RowIndex;

Read GridViewRow.RowIndex Property for more information.

edited Sep 27, 2013 at 12:40

answered Sep 27, 2013 at 12:28

Karl Anderson

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5 Comments

rootpanthera Over a year ago

It works perfect. One more question. How do I get checked row number?

Karl Anderson Over a year ago

@rootpanthera - see UPDATE: in answer.

rootpanthera Over a year ago

Hmm, actually I found out that it doesn't work as it should. It works only if last checkbox in a row is selected (true statement above). Else statement is always executed even if any other checkbox is checked. Any idea why?

Karl Anderson Over a year ago

What else statement, I don't have an else statement in the code I posted?

rootpanthera Over a year ago

Yep it was my bad. I mixed up something. Your code is perfect. I will accept your answer.

Manish Sharma · Accepted Answer · 2013-09-27 12:42:48Z

0

try this,

<asp:TemplateField>
        <ItemTemplate>
            <asp:CheckBox ID="myCheckBox" runat="server" AutoPostBack="true"
                       oncheckedchanged="CheckBox1_CheckedChanged" />
        </ItemTemplate>
</asp:TemplateField>

code side,

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
    GridViewRow row = ((GridViewRow)((CheckBox)sender).NamingContainer);
    int index = row.RowIndex;
    CheckBox cb1 = (CheckBox)Gridview.Rows[index].FindControl("myCheckBox");
    string checkboxstatus;
    if (cb1.Checked)
    {
      //write your code
    }        
    else
    {
      //write your code
    }
}

answered Sep 27, 2013 at 12:42

Manish Sharma

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