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How To Refresh The Dropdownlist Box


I have used the dropdownlist box. Now i want to refresh that dropdownlist every time i select the item from it.I have written a event handler function for that.Also made autopostback = true. But still it is not working.


View 17 Replies (Posted: Dec 22, 2008 07:24 AM)

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I have a DropDownList in my page, it DataBind with a objectDataSource.

when user select an option base that i have a FormViewthat show the detail of selected option an it also work with an othere ObjectDataSource.

when user insert, delete or edit an option for example the name of option will in edit mode changed and i need the DropDownList be refresh that show the new name of option.

i alredy know where should i write the code but i don't know how to refresh the DropDownList without dataBind the DropDownList because AppendDataBoundItems="True".

Posted: Apr 07, 2010 01:39 PM

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Posted: Mar 18 at 12:01

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Posted: Sep 09, 2008 04:13 AM

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Here is the code:

[code]....

Posted: Oct 27, 2009 08:01 AM

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[code]...

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Posted: Nov 03, 2010 09:32 AM

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Posted: Apr 15 10 at 17:30

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For example,

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Math|9.00-10.00|Hall|18|09090J|...

Below is my current codes which I have a problem.

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
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adapSel = new SqlDataAdapter(mySQL, conn);
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DataSet dsSel = new DataSet();
adapSel.Fill(dsSel);
GridView1.DataSource = dsSel;
GridView1.DataBind();
conn.Close();
}
Previously I have bind 7 column name in my dropdownlist
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
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conn.Open();
SqlDataReader ds;
ds = sqlCmd.ExecuteReader();
dd_list.Items.Clear();
dd_list.DataSource = ds;
dd_list.DataTextField = "Column_Name";
dd_list.DataValueField = "Column_Name";
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dd_list.Items.Insert(0, "Select Option");
ds.Close();
conn.Close();
}
}

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[Code]....

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[Code]....

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[Code]....

[Code]....

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[code]....

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[code].....

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[Code]....

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Server Error in '/DentalClaimPrjt' Application.

Cannot have multiple items selected in a DropDownList.

Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Cannot have multiple items selected in a DropDownList.

Source Error: [Code]....

Line 85: function openPopup2(did)
Line 86: {
Line 87: var hdnClm1 = document.getElementById('<%=hdnCliamid.ClientID%>').value;
Line 88: window.location="Form.aspx?DeleteRSPid=" + did + "&Editid="+ hdnClm1;
Line 89: }

Source File: d:DentalClaimPrjtForm.aspx Line: 87 Stack Trace: [Code]....

[HttpException (0x80004005): Cannot have multiple items selected in a DropDownList.]
System.Web.UI.WebControls.DropDownList.VerifyMultiSelect() +106
System.Web.UI.WebControls.ListControl.RenderContents(HtmlTextWriter writer) +124

Posted: Apr 29, 2010 06:21 AM

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