asked on

Show SelectedItem in Dropdownlist based on DataRow

i try to show the item in drop down list if the datarow returns let's say 2,
the ddl will select 2. but cannot

if (Request.QueryString["SLID"] != null && Request.QueryString["SLItemDelete"] == null)
            {
                DataSet1TableAdapters.SetLineTableAdapter adpt01 = new DataSet1TableAdapters.SetLineTableAdapter();
                DataTable dt = adpt01.GetSetLineData(Convert.ToInt64(Request.QueryString["SLID"]));

                ddlLevelID.SelectedItem.Text = dt.Rows[0]["LevelID"].ToString();
                ddlClassID.SelectedItem.Text = dt.Rows[0]["ClassID"].ToString();
                ddlSubjectID.SelectedItem.Text = dt.Rows[0]["SubjectID"].ToString();
                ddlTopicID.SelectedItem.Text = dt.Rows[0]["TopicID"].ToString();
                
            }

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krunal_shah

try like this,
ddlLevelID.SelectedValue= dt.Rows[0]["LevelID"].ToString();

doramail05

ASKER

had this

'ddlClassID' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

ASKER CERTIFIED SOLUTION

robasta

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krunal_shah

>> 'ddlClassID' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

This error shows that you are trying to set the value of dropdown which does not exists in the dropdown.