[NullReferenceException: Object reference not set to an instance of an object.]
Mufredat.DersAnaliz.GridView9_DataBound(Object sender, EventArgs e) in C:\Users\sinan\Desktop\New folder\Mufredat\Mufredat\DersAnaliz.aspx.cs:32
System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e) +125
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +133
System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +105
System.Web.UI.Control.EnsureChildControls() +106
System.Web.UI.Control.PreRenderRecursiveInternal() +57
System.Web.UI.Control.PreRenderRecursiveInternal() +226
System.Web.UI.Control.PreRenderRecursiveInternal() +226
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4004
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