Question

简单的c#winform sql数据库的增删改查功能 最好把代码和数据库都给我 谢谢啦 急！

279562326@qq.com

Answer 1

整删改查 都是sql语句 不分Winform和 Web
下面的是你需要的 我的表命叫 story
#region Method
/// <summary>
/// 增加一条数据
/// </summary>
public int Add(BW.Model.story model)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("insert into story(");
strSql.Append("title,contents,add_time)");
strSql.Append(" values (");
strSql.Append("@title,@contents,@add_time)");
strSql.Append(";select @@IDENTITY");
SqlParameter[] parameters = {
new SqlParameter("@title", SqlDbType.NVarChar,550),
new SqlParameter("@contents", SqlDbType.NVarChar),
new SqlParameter("@add_time", SqlDbType.DateTime)};
parameters[0].Value = model.title;
parameters[1].Value = model.contents;
parameters[2].Value = model.add_time;

object obj = DbHelperSQL.GetSingle(strSql.ToString(),parameters);
if (obj == null)
{
return 0;
}
else
{
return Convert.ToInt32(obj);
}
}
/// <summary>
/// 更新一条数据
/// </summary>
public bool Update(BW.Model.story model)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("update story set ");
strSql.Append("title=@title,");
strSql.Append("contents=@contents,");
strSql.Append("add_time=@add_time");
strSql.Append(" where id=@id");
SqlParameter[] parameters = {
new SqlParameter("@title", SqlDbType.NVarChar,550),
new SqlParameter("@contents", SqlDbType.NVarChar),
new SqlParameter("@add_time", SqlDbType.DateTime),
new SqlParameter("@id", SqlDbType.Int,4)};
parameters[0].Value = model.title;
parameters[1].Value = model.contents;
parameters[2].Value = model.add_time;
parameters[3].Value = model.id;

int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
if (rows > 0)
{
return true;
}
else
{
return false;
}
}

/// <summary>
/// 删除一条数据
/// </summary>
public bool Delete(int id)
{

StringBuilder strSql=new StringBuilder();
strSql.Append("delete from story ");
strSql.Append(" where id=@id");
SqlParameter[] parameters = {
new SqlParameter("@id", SqlDbType.Int,4)
};
parameters[0].Value = id;

int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
if (rows > 0)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// 批量删除数据
/// </summary>
public bool DeleteList(string idlist )
{
StringBuilder strSql=new StringBuilder();
strSql.Append("delete from story ");
strSql.Append(" where id in ("+idlist + ") ");
int rows=DbHelperSQL.ExecuteSql(strSql.ToString());
if (rows > 0)
{
return true;
}
else
{
return false;
}
}

/// <summary>
/// 得到一个对象实体
/// </summary>
public BW.Model.story GetModel(int id)
{

StringBuilder strSql=new StringBuilder();
strSql.Append("select top 1 id,title,contents,add_time from story ");
strSql.Append(" where id=@id");
SqlParameter[] parameters = {
new SqlParameter("@id", SqlDbType.Int,4)
};
parameters[0].Value = id;

BW.Model.story model=new BW.Model.story();
DataSet ds=DbHelperSQL.Query(strSql.ToString(),parameters);
if(ds.Tables[0].Rows.Count>0)
{
if(ds.Tables[0].Rows[0]["id"]!=null && ds.Tables[0].Rows[0]["id"].ToString()!="")
{
model.id=int.Parse(ds.Tables[0].Rows[0]["id"].ToString());
}
if(ds.Tables[0].Rows[0]["title"]!=null && ds.Tables[0].Rows[0]["title"].ToString()!="")
{
model.title=ds.Tables[0].Rows[0]["title"].ToString();
}
if(ds.Tables[0].Rows[0]["contents"]!=null && ds.Tables[0].Rows[0]["contents"].ToString()!="")
{
model.contents=ds.Tables[0].Rows[0]["contents"].ToString();
}
if(ds.Tables[0].Rows[0]["add_time"]!=null && ds.Tables[0].Rows[0]["add_time"].ToString()!="")
{
model.add_time=DateTime.Parse(ds.Tables[0].Rows[0]["add_time"].ToString());
}
return model;
}
else
{
return null;
}
}

/// <summary>
/// 获得数据列表
/// </summary>
public DataSet GetList(string strWhere)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("select id,title,contents,add_time ");
strSql.Append(" FROM story ");
if(strWhere.Trim()!="")
{
strSql.Append(" where "+strWhere);
}
return DbHelperSQL.Query(strSql.ToString());
}

/// <summary>
/// 获得前几行数据
/// </summary>
public DataSet GetList(int Top,string strWhere,string filedOrder)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("select ");
if(Top>0)
{
strSql.Append(" top "+Top.ToString());
}
strSql.Append(" id,title,contents,add_time ");
strSql.Append(" FROM story ");
if(strWhere.Trim()!="")
{
strSql.Append(" where "+strWhere);
}
strSql.Append(" order by " + filedOrder);
return DbHelperSQL.Query(strSql.ToString());
}

/// <summary>
/// 获取记录总数
/// </summary>
public int GetRecordCount(string strWhere)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("select count(1) FROM story ");
if(strWhere.Trim()!="")
{
strSql.Append(" where "+strWhere);
}
object obj = DbHelperSQL.GetSingle(strSql.ToString());
if (obj == null)
{
return 0;
}
else
{
return Convert.ToInt32(obj);
}
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
{
StringBuilder strSql=new StringBuilder();
strSql.Append("SELECT * FROM ( ");
strSql.Append(" SELECT ROW_NUMBER() OVER (");
if (!string.IsNullOrEmpty(orderby.Trim()))
{
strSql.Append("order by T." + orderby );
}
else
{
strSql.Append("order by T.id desc");
}
strSql.Append(")AS Row, T.* from story T ");
if (!string.IsNullOrEmpty(strWhere.Trim()))
{
strSql.Append(" WHERE " + strWhere);
}
strSql.Append(" ) TT");
strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex);
return DbHelperSQL.Query(strSql.ToString());
}

/*
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetList(int PageSize,int PageIndex,string strWhere)
{
SqlParameter[] parameters = {
new SqlParameter("@tblName", SqlDbType.VarChar, 255),
new SqlParameter("@fldName", SqlDbType.VarChar, 255),
new SqlParameter("@PageSize", SqlDbType.Int),
new SqlParameter("@PageIndex", SqlDbType.Int),
new SqlParameter("@IsReCount", SqlDbType.Bit),
new SqlParameter("@OrderType", SqlDbType.Bit),
new SqlParameter("@strWhere", SqlDbType.VarChar,1000),
};
parameters[0].Value = "story";
parameters[1].Value = "id";
parameters[2].Value = PageSize;
parameters[3].Value = PageIndex;
parameters[4].Value = 0;
parameters[5].Value = 0;
parameters[6].Value = strWhere;
return DbHelperSQL.RunProcedure("UP_GetRecordByPage",parameters,"ds");
}*/

#endregion Method

追问

可以写一个更新dataGridView里面的所有数据的button吗？我的数据库叫table，表叫USERS，列有3个 ID int null NAME vatchar50 null PWD varchar50 null

追答

都系都给你了 你这样不如让我帮你把你项目做完了。。。人要知足。。别懒惰

追问

多谢！

Answer 2

//增删查改
//string sql = "";
//SqlConnection cn=new SqlConnection("连接字符串");
//sql = "insert into table (字段1，字段2) values ('xx','aa')";//增
//sql = "delete from table where table_id ='" + ID + "'";//删
//sql = "select 字段1,字段2 from table where 条件";//查
//sql = "update table set 字段1='',字段2='' where table_id='" + ID + "' ";//改
//SqlDataAdapter da = new SqlDataAdapter(sql, cn);
//DataSet ds = new DataSet();
//da.Fill(ds);// 这样就执行了