C#常用增刪改查源碼精

1、這個(gè)是添加的代碼 using System; using System.Collections.Generic; usingSystem.Co mponen tModel; using System.Data; using System.Drawi ng; usingSystem.Text; using System.Wi ndows.Forms; using System.Data.SqlClie nt; n ames pace 學(xué)生成績(jī)管理系統(tǒng) public partial class studentluru : Form / CurrencyManager cmAme nd; / Sql

2、C onn ecti on sqlC onn ecti on1 = new SqlC onnection(; p ublic stude ntluru( In itializeCo mponen t(; p rivate void stude ntluru_Load(object sen der, Eve ntArgs e / 錄入 p rivate void butt on 5_Click(object sen der, Eve ntArgs e stri ng sno = textBox1.Text; stri ng sn ame = textBox2.Text; stri ng ssex

3、 = textBox3.Text; stri ng sage = textBox4.Text; stri ng sclass = textBox5.Text; stri ng sde pt = textBox6.Text; stri ng saddress = textBox7.Text; stri ng sphone = textBox8.Text; stri ng sqq = textBox9.Text; if (textBox1.Text = "" | textBox2.Text = "" | textBox5.Text = ""

4、; if (textBox1.Text="" MessageBox.Show("學(xué)號(hào)不能為空","警告提示",MessageBoxButt on s.OKCa ncel, MessageBoxIco n.Error; textBox1.Focus(; return; if(textBox2.Text = "" MessageBox.Show("姓名不能為空","警告提示",MessageBoxButt on s.OKCa ncel, MessageBoxIco n.Error

5、; textBox2.Focus(; return; if(textBox5.Text = "" MessageBox.Show("班級(jí)不能為空","警告提示",MessageBoxButt on s.OKCa ncel, MessageBoxIco n.Error; textBox5.Focus(; return; else stri ng conn str = "server=IT32;uid=sa; pwd='sa'database=sc;" try SqlC onn ectio n conn

6、 = new SqlC onn ectio n(c onn str; conn.Open(; stri ng sqli nsert = "in sert into stude ntinfo valuesC" + sno + "','" + sn ame + "','" + ssex + "','" + sage + "','" + sclass + "','" + sde pt + "&

7、#39;,'" + saddress + "','" + sphone + "','" + sqq + "”' SqlComma nd sc = newSqlComma nd(sqli nsert, conn; sc.ExecuteN on Query(; textBox1.Text = "" textBox2.Text =""textBox3.Text = "" textBox4.Text = "" tex

8、tBox5.Text = "" textBox6.Text =""textBox7.Text = "" textBox8.Text = "" textBox9.Text = "" MessageBox.Show("數(shù)據(jù)已 經(jīng)添加成功","溫馨提示"conn.Close(; catch (Exception ex MessageBox.Show(ex.ToStri ng(; p rivate void butt on 8_Click(object sen d

9、er, EventArgs e this.Dispose(; 這個(gè)是查詢界面的代碼 :using System; usingSystem.Collectio ns.Ge neric; using System.Co mponen tModel; using System.Data; usingSystem.Draw ing; using System.Text; using System.Wi ndows.Forms; usingSystem.Data.SqlClient; namespac學(xué)生成績(jī)管理系統(tǒng) public partial class stude ntchax un : Form

10、 DataTable dt = new DataTable(; stri ng per; stri ng sno;Curre ncyMa nager cmAme nd; p ublic stude ntchax un( In itializeCo mponen t(; p ublic stude ntchax un( stri ng k, stri ng s In itializeCo mponen t(; per = k; sno = s; p rivatevoid stude ntchaxun_Load(object sen der, Eve ntArgs e / TODO 這行代碼將數(shù)據(jù)

11、 加載到表“studentDataSet.studentinf中。您可以根據(jù)需要移動(dòng)或移除它。/this.stude ntin foTableAda pter.Fill(this.stude ntDataSet.stude ntinfo; /數(shù)據(jù)綁定 if (per = "超級(jí)用戶" string sqlsel = "select * from studentinfo " DataTable dt = bangding(sqlsel;cmAme nd = (Curre ncyMa nagerBi ndi ngCo ntextdt; this.dataGr

12、idView1.DataSource = dt;boBox1.DataSource = dt; boBox1.Dis playMember = "sno"boBox2.DataSource = dt; boBox2.Dis playMember = "sn ame" if (per ="普通用戶" string sqlsel = "select * from studentinfo where sno=”' + sno + "'"DataTable dt = bangdin g(sqlse

13、l; cmAme nd = (Curre ncyMa nagerBi ndi ngCon textdt;this.dataGridView1.DataSource = dt; boBox1.DataSource = dt;boBox1.Dis playMember = "sno" boBox2.E nabled = false;this.radioButt on 2.E nabled = false; /this.toolStri pButt on 1.E nabled = false;/this.toolStri pButto n2.E nabled = false; /

14、this.toolStri pButt on 3.E nabled = false;/this.toolStri pButt on 4.E nabled = false; /boBox2.DataSource = dt;/boBox2.Dis playMember = "sn ame" DataTable ban gdi ng(stri ng sqlsel stri ng conn str = "server=.;uid=sa ;p wd=sa;database=sc" using (SqlCo nn ecti on conn = new SqlC on

15、nection(conn str conn.Open(; DataSet ds = new DataSet(; SqlDataAda pter da = new SqlDataAda pter(sqlsel, conn; da.Fill(ds, "coust" DataTable dt = ds.Tables"coust" conn. Close(; retu rn dt; p rivate void butt on 1_Click(object sen der,Eve ntArgs e if (this.radioButt on 1.Checked =

16、 true stri ng xuehao = comboBox1.Text;stri ng sqlsel = "select * from stude ntinfo where sno='" + xuehao + "'"this.dataGridViewl.DataSource = bangdin g(sqlsel; else stri ng xingming = comboBox2.Text; stri ng sqlsel = "select * from stude nti nfo where sn ame='&qu

17、ot; + xingming+ "”' this.dataGridViewl.DataSource = bangdin g(sqlsel; p rivate void radioButt on 1_CheckedCha nged(object sen der. Eve ntArgs e if (this.radioButt on.Checked = true boBox1.E nabled = true;boBox2.E nabled = false; else boBoxl.E nabled = false;boBox2.E nabled = true; p rivate

18、void checkstate(i nt pos if (pos = 0 toolStri pButt on 1.E nabled = false; toolStri pButt on 2.E nabled = false;toolStri pButt on 3.E nabled = true; toolStri pButt on 4.E nabled = true; else toolStri pButt on 1.E nabled = true; toolStri pButto n2.E nabled = true;toolStri pButto n3.E nabled = true; t

19、oolStri pButt on 4.E nabled = true; / 首記錄 private void toolStri pButt on 1_Click(object sen der, Eve ntArgs e cmAme nd.Po siti on = 0;/設(shè)置 為 0.回到首記錄 this.dataGridView1.Select(; checkstate(cmAmend.Position; /上一條 p rivate void toolStri pButt on 2_Click(object sen der,Eve ntArgs e cmAme nd.Po sitio n-;

20、this.dataGridView1.Select(;checkstate(cmAme nd. Po sitio n; /下一條 p rivate void toolStri pButt on 3_Click(object sen der, Eve ntArgs e cmAme nd.Po sitio n+; this.dataGridView1.Select(; checkstate(cmAme nd.Po sitio n; /末記錄 p rivate void toolStri pButt on 4_Click(object sen der, Eve ntArgs e cmAme nd.P

21、o siti on = cmAme nd.Co unt - 1;this.dataGridView1.Select(; checkstate(cmAmend.Position; 刪除的代碼：usingSystem; using System.Collectio ns.Ge neric; using System.Co mponen tModel; usingSystem.Data; using System.Drawi ng; using System.Text; using System.Wi ndows.Forms; using System.Data.SqlClient; namespa

22、c學(xué)生成績(jī)管理系統(tǒng) public partial class stude ntsha nchu : Form Curre ncyMa nager cmAme nd; p ublic stude ntsha nchu( In itializeCo mponen t(; p rivate void stude ntsha nchu_Load(objectsen der, Eve ntArgs e / TODO:這行代碼將數(shù)據(jù)加載到表 “ stude ntDataSet.stude ntinfo”中。您可以根據(jù)需要移動(dòng)或移除它。/this.stude ntin foTableAda pter.Fil

23、l(this.stude ntDataSet.stude ntinfo; /數(shù) 據(jù)綁定 stri ng sqlsel = "select * from stude ntinfo " DataTable dt = bangdin g(sqlsel; cmAme nd = (Curre ncyMa nagerBi ndingCon textdt; this.dataGridViewl.DataSource = dt; this.textBoxl.DataBi ndi ngs.Add("text", dt, "s no" this.text

24、Box2.DataBi ndi ngs.Add("text", dt, "s name" this.textBox3.DataBi ndi ngs.Add("text", dt, "ssex"this.textBox4.DataB in di ngs.Add("text", dt, "sage"this.textBox5.DataBi ndi ngs.Add("text", dt, "sclass"this.textBox6.DataB

25、i ndin gs.Add("text", dt, "sde pt"this.textBox7.DataB in di ngs.Add("text", dt, "saddress"this.textBox8.DataB in di ngs.Add("text", dt, "s pho ne"this.textBox9.DataB indin gs.Add("text", dt, "sqq" DataTable ban gdi ng(st

26、n ng sqlsel stri ng conn str = "server=.;uid=sa ;p wd=sa;database=sc" using (SqlCo nn ecti on conn = new SqlC onnection(conn str conn.Open(; DataSet ds = new DataSet(; SqlDataAda pter da = new SqlDataAda pter(sqlsel, conn; da.Fill(ds, "coust" DataTable dt = ds.Tables"coust&q

27、uot; conn. Close(; retu rn dt; p rivate void checkBox1_CheckedCha nged(object sen der, Eve ntArgs e if (checkBox1.Checked = true this.Height = 450; else this.Height = 250; private void butt on 1_Click(object sender, EventArgs e if (MessageBox.Show(你確定要?jiǎng)h除該記錄嗎","詢問(wèn)",MessageBoxButt on s.

28、OKCa ncel, MessageBoxIc on .Questi on = DialogResult.OK intpos = this.dataGridView1.Curre ntCelI.Rowl ndex; 獲取該行 stri ng conn str = "server=.;uid=sa; pwd=sa;database=sc" using (SqlC onn ectio n conn = newSqlCo nn ecti on(conn str conn.Open(; DataSet ds = new DataSet(; stri ng sqlset = &quo

29、t;select* from stude ntin fo" / 數(shù)據(jù)集 SqlDataAda pter da = new SqlDataAda pter(sqlset, conn;da.Fill(ds, "coust" DataTable dt = ds.Tables"coust"SqlComma ndBuilder cb = new SqlComma ndBuilder(da; dt.Rows pos.Delete(;da.U pdate(ds, "coust" textBox1.Text = "" t

30、extBox2.Text = "" textBox3.Text =""textBox4.Text = "" textBox5.Text = "" textBox6.Text = "" textBox7.Text =""textBox8.Text = "" textBox9.Text = "" this.dataGridView1.DataSource =bangding(sqlset; MessageBox.Show(恭喜你已成功刪除&

31、quot;,"溫馨提示"conn.Close(; 修改的代碼：using System; using System.Collections.Generic;using System.Co mponen tModel; using System.Data; using System.Draw ing; using System.Text; using System.Wi ndows.Forms; using System.Data.SqlClie nt; n ames pace 學(xué)生成績(jī)管理系統(tǒng) p ublic p artial class stude ntxiugai :

32、Form stri ng conn str = "server=.;uid=sa ;p wd=sa;database=sc" stri ng per; stri ng sno; Curre ncyMa nager cmAme nd; p ublic stude ntxiugai( In itializeCo mponen t(; p ublic stude ntxiugai(stri ng k,stri ng s In itializeCo mponen t(; per = k; sno = s; p rivate void checkBox1_CheckedCha nge

33、d(object sen der, Eve ntArgs e if (checkBox1.Checked = true /this.Height = 450; comboBox1.E nabled = false; textBox1.E nabled = false; else /this.Height = 250; comboBoxl.E nabled = true; textBoxl.E nabled = true; p rivate void studentxiugai_Load(object sender, EventArgs e /數(shù)據(jù)綁定 if (per ="超級(jí)用戶&q

34、uot; stri ng sqlsel = "select * from stude nti nfo order by sno asc " DataTable dt = bangdin g(sqlsel; cmAme nd = (Curre ncyMa nagerB indingCon textdt;boBoxl.DataSource = dt; boBox1.Dis playMember = "sno"this.textBoxl.DataBi ndi ngs.Add("text", dt, "s name"thi

35、s.textBox2.DataB in di ngs.Add("text", dt, "ssex"this.textBox3.DataB in di ngs.Add("text", dt, "sage"this.textBox4.DataB in di ngs.Add("text", dt, "sclass"this.textBox5.DataB in di ngs.Add("text", dt, "sde pt"this.textBo

36、x6.DataBi ndi ngs.Add("text", dt, "saddress"this.textBox7.DataB in di ngs.Add("text", dt, "s pho ne"this.textBox8.DataB in di ngs.Add("text", dt, "sqq" if (per ="普通用戶" stri ng sqlsel ="select *from stude nti nfo where sno=

37、9;" + sno + "'" DataTable dt = bangdin g(sqlsel;boBoxl.DataSource = dt; boBox1.Dis playMember = "sno"this.textBoxl.DataB in di ngs.Add("text", dt, "s name"this.textBox2.DataB in di ngs.Add("text", dt, "ssex"this.textBox3.DataB in d

38、i ngs.Add("text", dt, "sage"this.textBox4.DataB in di ngs.Add("text", dt, "sclass"this.textBox5.DataB in di ngs.Add("text", dt, "sde pt"this.textBox6.DataBi ndi ngs.Add("text", dt, "saddress"this.textBox7.DataB in di ngs

39、.Add("text", dt, "s pho ne"this.textBox8.DataBi ndi ngs.Add("text", dt, "sqq" DataTable ban gdi ng(stri ng sqlsel / stri ng conn str = "server=.;uid=sa ;p wd=sa;database=sc" using (SqlC onnection conn = new SqlC onnection(conn str conn.Open(; DataSet

40、 ds = new DataSet(; SqlDataAda pter da = new SqlDataAda pter(sqlsel, conn; da.Fill(ds, "coust" DataTable dt = ds.Tables"coust" conn. Close(; retu rn dt; p rivate void butt on 1_Click(object sen der, Eve ntArgs e if (checkBox1.Checked = true stri ng sno = comboBox1.Text;stri ng sn

41、 ame = textBox1.Text; stri ng sex = textBox2.Text; stri ng age = textBox3.Text;stri ng sclass = textBox4.Text; stri ng sde pt = textBox5.Text; stri ng saddress = textBox6.Text; stri ng sphone = textBox7.Text; stri ng sqq = textBox8.Text; if (textBox2.Text = "" | textBox3.Text = "" | textBox4.Text = "" | textBox5.Text ="" if (textBox2.Text = "" MessageBox.Show("性別不能為空"