如何从datagridview获取数据并将其更新到数据库？ [英] How to get the data from datagridview and update it to the database?

问题描述

你好。



我有一个datagridview，显示数据库中记录总数的50％。现在，我需要在tblclass，tblstudentinfo中更新它们的节名。我不知道怎么。有人可以帮帮我吗？



这是我的代码：

 p_table1 = new DataTable（）; 
 p_table1.Clear（）; 
 string questa =SELECT TOP 50％*来自tblStudentInformation，其中GradeLevel ='+ label2.Text +'和Result> = 85且SectionName为IS NULL; 
 SqlDataAdapter rad = new SqlDataAdapter（questa，conn）; 
 rad.Fill（p_table1）; 
 dataGridView2.DataSource = p_table1; 
 

解决方案

p_table1 = new DataTable（）;

p_table1.Clear（）;

string questa =SELECT TOP 50％*来自tblStudentInformation其中GradeLevel ='+ label2.Text +'和Result> = 85且SectionName IS NULL;

SqlDataAdapter rad = new SqlDataAdapter（questa，conn）;

rad.Fill（p_table1）;

dataGridView2.DataSource = p_table1;



string data =update tblStudentInformation set SectionName ='your update value'where WhereLevel ='+ label2.Text +'且Result> = 85且SectionName IS NULL;

rad = new SqlDataAdapter（data，conn）;

rad.Fill（p_table1）;

dataGridView2.DataSource = p_table1;

Hi guys.

I have a datagridview that displays the 50 percent of the total number of the records in the database. Now, I need to update their section name in tblclass, tblstudentinfo. I do not know how. Can anyone help me?

Here is my code:

p_table1 = new DataTable();
              p_table1.Clear();
              string questa = "SELECT  TOP 50 Percent * from tblStudentInformation Where GradeLevel ='" + label2.Text + "' and Result >= 85  and SectionName IS NULL";
              SqlDataAdapter rad = new SqlDataAdapter(questa, conn);
              rad.Fill(p_table1);
              dataGridView2.DataSource = p_table1;

解决方案

p_table1 = new DataTable();
p_table1.Clear();
string questa = "SELECT TOP 50 Percent * from tblStudentInformation Where GradeLevel ='" + label2.Text + "' and Result >= 85 and SectionName IS NULL";
SqlDataAdapter rad = new SqlDataAdapter(questa, conn);
rad.Fill(p_table1);
dataGridView2.DataSource = p_table1;

string data= "update tblStudentInformation set SectionName ='your update value' where Where GradeLevel ='" + label2.Text + "' and Result >= 85 and SectionName IS NULL";
rad = new SqlDataAdapter(data, conn);
rad.Fill(p_table1);
dataGridView2.DataSource = p_table1;

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