Avoid Invalid Postback

Question

I keep getting an invalid postback error, I know why, but how do I avoid and fix it?  This is my syntaxx and anytime the Save button is pressed this is thrown.  What do I do to fix it?  Most answers I see are add to if (!ispostback) but that is not applicable in my scenario.

[code]

 

protected void Page_Load(object sender, EventArgs e)

{

try

{

if (!IsPostBack)

{

Setup();

GetCustom();

PullData();

}

}

catch

{

}

}

private void GetCustom()

{

this.ddlInfo.DataSource = StoredProcedureToPullResults;

this.ddlInfo.DataTextField = "BindFIeld";

this.ddlInfo.DataValueField = "BindFIeld";

this.ddlInfo.DataBind();

}

protected void btnSave_Click(object sender, EventArgs e)

{

try

{

foreach (ListItem item in this.chkList.Items)

{

if (item.Selected)

{

//SQL Insert STatement

}

}

}

catch { }

}

private void PullData()

{

try

{

this.dtgData.DataSource = StoredProcedure;

this.dtgData.DataBind();

}

catch {}

}

[/code]