checklist box selected value only

Hi All,
Iam using check list box. while search  function the database value only i want to show in checklist box.  Iam using following code.
if (dataSet.Tables[0].Rows[0]["Facilities"].ToString().Length > 0) { string[] splitTxt = null; splitTxt = dataSet.Tables[0].Rows[0]["Facilities"].ToString().Split('|'); foreach (string arryVal in splitTxt) { if (cblAddNewSPAFacilities.Items.FindByValue(arryVal) != null) { cblAddNewSPAFacilities.Items.FindByValue(arryVal).Selected = true; } } }
while searching before record value also  show i the checklist box. How i avoid this.........
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