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POHow to Access Programmatically Added checkbox
 

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  1. POHow to Access Programmatically Added checkbox
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    <p>I am developing an application in which i needed the to add filter. for that am adding checkbox programmatically because the filtering option are not predefine it depends on the value in the table to i add the checkbox as fallow </p> <pre><code>public void addCusineCheckbox() { DataTable CusineList = Sql.ExecuteSelectCommand("select prod_group_id,Prod_group_name from Master_Prod_Groups"); for (int i = 0; i &lt; CusineList.Rows.Count; i++) { CheckBox chkCusine = new CheckBox(); chkCusine.ID = "chk" + CusineList.Rows[i]["Prod_group_name"].ToString(); chkCusine.Text = CusineList.Rows[i]["Prod_group_name"].ToString(); divCusineFilter.Controls.Add(chkCusine); } } </code></pre> <p>which help user to select the required field(there more other option to select) and then click on apply filter on that am try to access the that added check box as fallow</p> <pre><code>public string getCusineFilterString() { string CusineID =null; DataTable CusineList = Sql.ExecuteSelectCommand("select prod_group_id,Prod_group_name from Master_Prod_Groups"); for (int i = 0; i &lt; CusineList.Rows.Count; i++) { CheckBox chk = (CheckBox)Page.FindControl("chk" + CusineList.Rows[i]["Prod_group_name"]); if (chk.Checked == true) { if (i == 0) { CusineID = CusineList.Rows[i]["prod_group_id"].ToString(); } else { CusineID = CusineID + "," + CusineList.Rows[i]["prod_group_id"].ToString(); } } } return CusineID; } </code></pre> <p>but it gives the error that object not set to an instance.</p> <p>i am not getting any idea to access to the checkbox.</p>
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    1. USRhushikesh
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      1. POHow to Access Programmatically Added checkbox
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    1. COOn which line you get this error?
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      1. USSoner Gönül
    2. COIm going to guess that chk is null so add to your if which should look like `if (chk != null && chk.Checked == true)`
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      1. USAshley Medway
    3. COsir i have add the check box on page load event. and on button click event am try to check all the check box to form the filtering constraint . for that am try to access the programmatically added check box by using findcontrol and form the same id as i assign it while adding but it doesnot getting
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      1. USRhushikesh
 

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