更新值与相同的id

Question

我有3个表

1. LaminationTitle **

LaminationTitleRelation

Papertypemaster

我想更新它来自的CheckBoxList “LaminationTitleRelation” 表中的值...下面是我的更新表单.... 下面的表单中LaminationTitle表，更新层压标题，其中作为 复选框列表项应LaminationTitleRelation表更新

注意：如果LaminationTitleRelation和Items Checked中的“Papertypeid”不同，那么应该加上。

PLZ帮我

Answer 1

使用以下查询：

query = "Create Table #PaperTypeMapping(LaminationTitleId int, PaperTypeId int)"; 

//For each value of Paper Type Id you will need to insert a row 
query = "Insert Into #PaperTypeMapping(LaminationTitleId, PaperTypeId) Values(@laminationId, @paperTypeId)"; 

//Update existing values 
query = "Update OldMapping Set OldMapping.ActiveStatus = 1 FROM LaminationTitleRelation OldMapping Inner join #PapertTypeMapping NewMapping ON OldMapping.LamTitleId = NewMapping.LaminationTitleId and OldMapping.PaperTypeId = NewMapping.PaperTypeId" 

//Insert new values 
query = "Insert into LaminationTitleRelation(lamTitleId, PapertTypeId, ActiveStatus) Select LaminationTitleId, PapertTYpeId, 1 From #PaperTypeMapping NewMapping where NOT EXISTS(SELECT 1 FROM LaminationTitleRelation OldMapping WHERE OldMapping.LamTitleId = NewMapping.LaminationTitleId and OldMapping.PaperTypeId = NewMapping.PaperTypeId)"; 

或者你也可以使用下面的链接一个由MS SQL内置的实用工具Merge

Answer 2

protected void btnUpdate_Click(object sender, EventArgs e) { 
     DB = new DBFunctions(); 
     string vItems = mGetSelectedItems(); 
     string vQuery = "Update laminationtitle Set title='" + txtLaminationTitle.Text + "',laminationtypeid='" + ddlProductType.SelectedValue + "' where laminationid='" + Request.QueryString["laminationid"] + "'"; 
     int x = DB.SetData(vQuery); 
     DataTable dSelect = new DataTable(); 
     DataTable dAll = new DataTable(); 
     DB = new DBFunctions(); 
     DB1 = new DBFunctions(); 
     if (x > 0) { 
      int y = DB.SetData("delete from laminationtitlepapertyperelation where lamtitleid=" + Request.QueryString["laminationid"]); 
      if (y > 0) { 
       string[] values = vItems.Split(','); 
       for (int i = 0; i < values.Length; i++) { 
        vQuery = "insert into laminationtitlepapertyperelation(lamtitleid, papertypeid, activestatus)VALUES('" + Request.QueryString["laminationid"].ToString() + "','" + values[i] + "',1)"; 
        DB.SetData(vQuery); 
        ScriptManager.RegisterStartupScript(this, GetType(), " Update Lamination Title", "alert('Lamination " + '"' + txtLaminationTitle.Text + '"' + " Title Updated Sucessfully');window.location='ManageLaminationTitle.aspx';", true); 
       } 
      } 
     } 
    }