[ASP.NET][Event] 當事件超過一個時判斷觸發事件

2008-12-19

摘要:[ASP.NET][EventHandler]當事件超過一個時判斷觸發事件

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Alex70386 寫信:

如果textBox1和textBox2 共用一個 EventHandler
可以利用TextChanged(object sender, EventArgs e)中的 object sender
來查詢是 textBox1觸發的還是 textBox2

請問如何判斷 ""來查詢是 textBox1觸發的還是 textBox2 """???

sender.tostring or ????

謝謝

Alex

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MyAnswer :

//sender強制轉換型別(這麼想會比較好記 ==> 事件物件實體化)
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protected void tbAM_TextChanged(object sender, EventArgs e)
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{
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TextBox tb = (TextBox)sender;
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try
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{
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if (tb.ID == "tbAM")
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{
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DropDownList ddl1 = (DropDownList)FindControl("ddlMeterial" + tb.ID.Substring(2, 1) + "1");
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DropDownList ddl2 = (DropDownList)FindControl("ddlMeterial" + tb.ID.Substring(2, 1) + "2");
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ddl1.Visible = true;
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ddl2.Visible = true;
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}
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}
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catch
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{
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tb.Text = "Error";
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}
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}

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