遍历datatable的方法

 

遍历datatable的方法2009-09-08 10:02方法一：
DataTable dt = dataSet.Tables[0];
for(int i = 0 ; i < dt.Rows.Count ; i++)
{
string strName = dt.Rows[i]["字段名"].ToString();
}

方法二：
foreach(DataRow myRow in myDataSet.Tables["temp"].Rows)
{
var str = myRow[0].ToString();
}

方法三：
foeach(DataRow dr in dt.Rows)
{
object value = dr["ColumnsName"];
}

方法四：
DataTable dt=new DataTable();
foreach(DataRow dr in dt.Rows)
{
for(int i=0;i<dt.Columns.Count;i++)
{
dr[i];
}
}

绑定DataTable到Reapter。
if (dtb_xx.Rows.Count > 0)
{
rp_xx.DataSource = dtb_xx;
rp_xx.DataBind();
}
<asp:Repeater ID="rp_xx" runat="server">
<ItemTemplate>
<tr>
<td>
<div>
<ul class="ListHorizontally">
<li>
<div class="TCell1">
<%#Eval("ID")%>
</div>
</li>
<li>
<div class="TCell2">
<%#Eval("Name")%>
</div>
</li>
</ul>
</div>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
方法五
DataRow[] dataRows = null;
dataRows = dataTable.Select(fieldParentID + "='" + treeNode.Tag.ToString() + "'", dataTable.DefaultView.Sort);
foreach (DataRow dataRow in dataRows)
{

DataRow dataRow = dataTable.Rows[i];

?? = dataRow[fieldParentID].ToString();
}

 

 

 

List<string>转换成字符串

List<string> list = new List<string>();
list.Add("a");
list.Add("b");
list.Add("c");
string str = string.Join(",", list.ToArray());

字符串转成List<string>

string str = "a,b,c";

List<string> list = new List<string>(str.Split(','));
List<string> list = new List<string>(str.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries)); //转换时不包含空项