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for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                if (ds.Tables[0].Rows[i]["ÇøÓò¼ò³Æ"] == "")
                {
                   
                }
                if (ds.Tables[0].Rows[i]["ÇøÓòÈ«³Æ"] == "")
                {

                }
            }
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C# code:
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
if (ds.Tables[0].Rows[i]["ÇøÓò¼ò³Æ"] == "")


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Form2 f=new Form2();
f.Show();
this.Close();

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f.Show();
this.Close();
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