Gridview的中数据的截取

后端代码：

 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            databind();
        }

    }
    public void databind()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Conn"].ToString());
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "Select * From Customers";
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        this.GridView1.DataSource = ds.Tables[0];
        this.GridView1.DataKeyNames = new string[] { "CustomerID" };
        this.GridView1.DataBind();
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Cells[1].Text = SubstringStr(e.Row.Cells[1].Text, 5);
        }
    }
    public string SubstringStr(string str, int len)
    {
        if (str.Length <= len)
        {
            return str; 
        }
        else
        {
            return str.Substring(0, len) + "...";
        }
    }