GridView小記

1.綁定鍵值及讀取

前端設置：DataKeyNames=「Field1，Field2」;

後臺設置：GridView1.DataKeyNames=Gridview1.DataKeyNames = new string[] { "PositionID", "DepartmentID" };

後臺讀取：string key=this.GridView1.DataKeys[i][0].ToString();

2.可編輯列

<asp:TemplateField HeaderText="Field1" ControlStyle-Width="100px" />
    <ItemTemplate>
        <asp:TextBox ID="Field1" runat="server" Text='<%# Bind("Field1") %>'></asp:TextBox>
    </ItemTemplate>
</asp:TemplateField>

3.斑馬線及鼠標停留變色

前端：onrowdatabound="GridView1_RowDataBound"

後臺：

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        for (int i = 0; i < GridView1.Rows.Count; i++) //執行循環，保證每條數據均可以更新
        {
            if (e.Row.RowType == DataControlRowType.DataRow)  //首先判斷是不是數據行
            {
                //當鼠標停留時更改背景色
                e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#999'");
                //當鼠標移開時還原背景色
                e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");
            }
            if (i % 2 == 0)
                this.GridView1.Rows[i].BackColor = System.Drawing.Color.Honeydew;
        }
    }

4.導出EXCEL

protected void btnExport_Click(object sender, EventArgs e)    

{        

    Response.ContentEncoding = System.Text.Encoding.UTF8;//編碼不能錯，錯了就會亂碼，EXCEL解釋不了格式就把HTML文本所有顯示        

    Response.AppendHeader("Content-Disposition", "attachment;filename=SampleIssue.xls");        

    Response.ContentType = "application/ms-excel";        

    this.EnableViewState = false;        

    StringWriter sw= new StringWriter();        

    HtmlTextWriter htw = new HtmlTextWriter(sw);        

    GridView1.RenderControl(htw);        

    Response.Write(sw.ToString());        

    Response.End();    

}

 

/// <summary>    

/// 導出EXCEL，要寫一個空的VerifyRenderingInServerForm方法    

/// </summary>    

/// <param name="control"></param>    

public override void VerifyRenderingInServerForm(Control control)    

{        

// Confirms that an HtmlForm control is rendered for    

}

如出現錯誤提示「RegisterForEventValidation can only be called during Render();」，則在<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>裏面加入 EnableEventValidation="false"便可。