本文实例讲述了asp.net使用DataTable构造Json字符串的方法。分享给大家供大家参考，具体如下：
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/// <summary>
/// 将datatable转换为json
/// </summary>
/// <param name="dtb"></param>
/// <returns></returns>
private string Dtb2Json(DataTable dtb) {
JavaScriptSerializer jss = new JavaScriptSerializer();
System.Collections.ArrayList dic = new System.Collections.ArrayList();
foreach (DataRow dr in dtb.Rows)
{
System.Collections.Generic.Dictionary<string, object> drow = new System.Collections.Generic.Dictionary<string, object>();
foreach (DataColumn dc in dtb.Columns)
{
drow.Add(dc.ColumnName, dr[dc.ColumnName]);
}
dic.Add(drow);
}
//序列化
return jss.Serialize(dic);
} /// <summary>
/// 构建JSON字符串
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string CreateJsonParameters(DataTable dt)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
if (dt != null && dt.Rows.Count > 0)
{
sb.Append("[");
for (int i = 0; i < dt.Rows.Count; i++)
{
sb.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
//如果值不是最后一个则添加逗号分隔
if (j < dt.Columns.Count - 1)
{
sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/",");
}
//如果值为最后个字符则不添加逗号
else if (j == dt.Columns.Count - 1)
{
sb.Append("/"" + dt.Columns[j].ColumnName.ToString() + "/":" + "/"" + dt.Rows[i][j].ToString() + "/"");
}
}
//如果为最后一个值的话 则不添加逗号
if (i == dt.Rows.Count - 1)
{
sb.Append("}");
}
else
{
sb.Append("},");
}
}
sb.Append("]");
return sb.ToString();
}
else { return null; }
}
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希望本文所述对大家asp.net程序设计有所帮助。